©#MIN âSyntax:
MIN([DISTINCT] expr)

Returns the minimum value of expr. MIN() may take a string argument; in
such cases, it returns the minimum string value. See
http://dev.mysql.com/doc/refman/5.0/en/mysql-indexes.html. The DISTINCT
keyword can be used to find the minimum of the distinct values of expr,
however, this produces the same result as omitting DISTINCT.

MIN() returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

} mysql> SELECT student_name, MIN(test_score), MAX(test_score)
    ->        FROM student
    ->        GROUP BY student_name;
>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html
Ö"   JOIN #
MySQL supports the following JOIN syntaxes for the table_references
part of SELECT statements and multiple-table DELETE and UPDATE
statements:

table_references:
    table_reference [, table_reference] ...

table_reference:
    table_factor
  | join_table

table_factor:
    tbl_name [[AS] alias] [index_hint)]
  | table_subquery [AS] alias
  | ( table_references )
  | { OJ table_reference LEFT OUTER JOIN table_reference
        ON conditional_expr }

join_table:
    table_reference [INNER | CROSS] JOIN table_factor [join_condition]
  | table_reference STRAIGHT_JOIN table_factor
  | table_reference STRAIGHT_JOIN table_factor ON conditional_expr
  | table_reference {LEFT|RIGHT} [OUTER] JOIN table_reference join_condition
  | table_reference NATURAL [{LEFT|RIGHT} [OUTER]] JOIN table_factor

join_condition:
    ON conditional_expr
  | USING (column_list)

index_hint:
    USE {INDEX|KEY} [FOR JOIN] (index_list)
  | IGNORE {INDEX|KEY} [FOR JOIN] (index_list)
  | FORCE {INDEX|KEY} [FOR JOIN] (index_list)

index_list:
    index_name [, index_name] ...

A table reference is also known as a join expression.

The syntax of table_factor is extended in comparison with the SQL
Standard. The latter accepts only table_reference, not a list of them
inside a pair of parentheses.

This is a conservative extension if we consider each comma in a list of
table_reference items as equivalent to an inner join. For example:

SELECT * FROM t1 LEFT JOIN (t2, t3, t4)
                 ON (t2.a=t1.a AND t3.b=t1.b AND t4.c=t1.c)

is equivalent to:

SELECT * FROM t1 LEFT JOIN (t2 CROSS JOIN t3 CROSS JOIN t4)
                 ON (t2.a=t1.a AND t3.b=t1.b AND t4.c=t1.c)

In MySQL, CROSS JOIN is a syntactic equivalent to INNER JOIN (they can
replace each other). In standard SQL, they are not equivalent. INNER
JOIN is used with an ON clause, CROSS JOIN is used otherwise.

In versions of MySQL prior to 5.0.1, parentheses in table_references
were just omitted and all join operations were grouped to the left. In
general, parentheses can be ignored in join expressions containing only
inner join operations. As of 5.0.1, nested joins are allowed (see
http://dev.mysql.com/doc/refman/5.0/en/nested-join-optimization.html).

Further changes in join processing were made in 5.0.12 to make MySQL
more compliant with standard SQL. These charges are described later in
this section.

Index hints can be specified to affect how the MySQL optimizer makes
use of indexes. For more information, see
http://dev.mysql.com/doc/refman/5.0/en/index-hints.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/join.html

r SELECT left_tbl.*
  FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id = right_tbl.id
  WHERE right_tbl.id IS NULL;
0http://dev.mysql.com/doc/refman/5.0/en/join.html  ť"   HEX" ÔSyntax:
HEX(N_or_S)

If N_or_S is a number, returns a string representation of the
hexadecimal value of N, where N is a longlong (BIGINT) number. This is
equivalent to CONV(N,10,16).

If N_or_S is a string, returns a hexadecimal string representation of
N_or_S where each character in N_or_S is converted to two hexadecimal
digits. The inverse of this operation is performed by the UNHEX()
function.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

} mysql> SELECT HEX(255);
        -> 'FF'
mysql> SELECT 0x616263;
        -> 'abc'
mysql> SELECT HEX('abc');
        -> 616263
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html›2   REPLACE VSyntax:
REPLACE [LOW_PRIORITY | DELAYED]
    [INTO] tbl_name [(col_name,...)]
    {VALUES | VALUE} ({expr | DEFAULT},...),(...),...

Or:

REPLACE [LOW_PRIORITY | DELAYED]
    [INTO] tbl_name
    SET col_name={expr | DEFAULT}, ...

Or:

REPLACE [LOW_PRIORITY | DELAYED]
    [INTO] tbl_name [(col_name,...)]
    SELECT ...

REPLACE works exactly like INSERT, except that if an old row in the
table has the same value as a new row for a PRIMARY KEY or a UNIQUE
index, the old row is deleted before the new row is inserted. See [HELP
INSERT].

REPLACE is a MySQL extension to the SQL standard. It either inserts, or
deletes and inserts. For another MySQL extension to standard SQL ---
that either inserts or updates --- see
http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html.

Note that unless the table has a PRIMARY KEY or UNIQUE index, using a
REPLACE statement makes no sense. It becomes equivalent to INSERT,
because there is no index to be used to determine whether a new row
duplicates another.

Values for all columns are taken from the values specified in the
REPLACE statement. Any missing columns are set to their default values,
just as happens for INSERT. You cannot refer to values from the current
row and use them in the new row. If you use an assignment such as SET
col_name = col_name + 1, the reference to the column name on the right
hand side is treated as DEFAULT(col_name), so the assignment is
equivalent to SET col_name = DEFAULT(col_name) + 1.

To use REPLACE, you must have both the INSERT and DELETE privileges for
the table.

URL: http://dev.mysql.com/doc/refman/5.0/en/replace.html

3http://dev.mysql.com/doc/refman/5.0/en/replace.html l 2   CONTAINS ń Contains(g1,g2)

Returns 1 or 0 to indicate whether g1 completely contains g2. This
tests the opposite relationship as Within().

URL: http://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html

hhttp://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html "   SRID! eSRID(g)

Returns an integer indicating the Spatial Reference System ID for the
geometry value g.

In MySQL, the SRID value is just an integer associated with the
geometry value. All calculations are done assuming Euclidean (planar)
geometry.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions

7mysql> SELECT SRID(GeomFromText('LineString(1 1,2 2)',101));
+-----------------------------------------------+
| SRID(GeomFromText('LineString(1 1,2 2)',101)) |
+-----------------------------------------------+
|                                           101 |
+-----------------------------------------------+
khttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions 2   CURRENT_TIMESTAMP ˝ Syntax:
CURRENT_TIMESTAMP, CURRENT_TIMESTAMP()

CURRENT_TIMESTAMP and CURRENT_TIMESTAMP() are synonyms for NOW().

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlŚ 2   VARIANCE ;Syntax:
VARIANCE(expr)

Returns the population standard variance of expr. This is an extension
to standard SQL. As of MySQL 5.0.3, the standard SQL function VAR_POP()
can be used instead.

VARIANCE() returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.htmlo2   VAR_SAMP Syntax:
VAR_SAMP(expr)

Returns the sample variance of expr. That is, the denominator is the
number of rows minus one. This function was added in MySQL 5.0.3.

VAR_SAMP() returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html C"	   CONCAT" TSyntax:
CONCAT(str1,str2,...)

Returns the string that results from concatenating the arguments. May
have one or more arguments. If all arguments are nonbinary strings, the
result is a nonbinary string. If the arguments include any binary
strings, the result is a binary string. A numeric argument is converted
to its equivalent binary string form; if you want to avoid that, you
can use an explicit type cast, as in this example:

SELECT CONCAT(CAST(int_col AS CHAR), char_col);

CONCAT() returns NULL if any argument is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

  mysql> SELECT CONCAT('My', 'S', 'QL');
        -> 'MySQL'
mysql> SELECT CONCAT('My', NULL, 'QL');
        -> NULL
mysql> SELECT CONCAT(14.3);
        -> '14.3'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html E2
   GEOMETRY HIERARCHY ŕGeometry is the base class. It is an abstract class. The instantiable
subclasses of Geometry are restricted to zero-, one-, and
two-dimensional geometric objects that exist in two-dimensional
coordinate space. All instantiable geometry classes are defined so that
valid instances of a geometry class are topologically closed (that is,
all defined geometries include their boundary).

The base Geometry class has subclasses for Point, Curve, Surface, and
GeometryCollection:

o Point represents zero-dimensional objects.

o Curve represents one-dimensional objects, and has subclass
  LineString, with sub-subclasses Line and LinearRing.

o Surface is designed for two-dimensional objects and has subclass
  Polygon.

o GeometryCollection has specialized zero-, one-, and two-dimensional
  collection classes named MultiPoint, MultiLineString, and
  MultiPolygon for modeling geometries corresponding to collections of
  Points, LineStrings, and Polygons, respectively. MultiCurve and
  MultiSurface are introduced as abstract superclasses that generalize
  the collection interfaces to handle Curves and Surfaces.

Geometry, Curve, Surface, MultiCurve, and MultiSurface are defined as
noninstantiable classes. They define a common set of methods for their
subclasses and are included for extensibility.

Point, LineString, Polygon, GeometryCollection, MultiPoint,
MultiLineString, and MultiPolygon are instantiable classes.

URL: http://dev.mysql.com/doc/refman/5.0/en/gis-geometry-class-hierarchy.html

Hhttp://dev.mysql.com/doc/refman/5.0/en/gis-geometry-class-hierarchy.htmlř "   CHAR FUNCTION" 3Syntax:
CHAR(N,... [USING charset_name])

CHAR() interprets each argument N as an integer and returns a string
consisting of the characters given by the code values of those
integers. NULL values are skipped.
As of MySQL 5.0.15, CHAR() arguments larger than 255 are converted into
multiple result bytes. For example, CHAR(256) is equivalent to
CHAR(1,0), and CHAR(256*256) is equivalent to CHAR(1,0,0):

mysql> SELECT HEX(CHAR(1,0)), HEX(CHAR(256));
+----------------+----------------+
| HEX(CHAR(1,0)) | HEX(CHAR(256)) |
+----------------+----------------+
| 0100           | 0100           |
+----------------+----------------+
mysql> SELECT HEX(CHAR(1,0,0)), HEX(CHAR(256*256));
+------------------+--------------------+
| HEX(CHAR(1,0,0)) | HEX(CHAR(256*256)) |
+------------------+--------------------+
| 010000           | 010000             |
+------------------+--------------------+

By default, CHAR() returns a binary string. To produce a string in a
given character set, use the optional USING clause:

mysql> SELECT CHARSET(CHAR(0x65)), CHARSET(CHAR(0x65 USING utf8));
+---------------------+--------------------------------+
| CHARSET(CHAR(0x65)) | CHARSET(CHAR(0x65 USING utf8)) |
+---------------------+--------------------------------+
| binary              | utf8                           |
+---------------------+--------------------------------+

If USING is given and the result string is illegal for the given
character set, a warning is issued. Also, if strict SQL mode is
enabled, the result from CHAR() becomes NULL.

Before MySQL 5.0.15, CHAR() returns a string in the connection
character set and the USING clause is unavailable. In addition, each
argument is interpreted modulo 256, so CHAR(256) and CHAR(256*256) both
are equivalent to CHAR(0).

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

o mysql> SELECT CHAR(77,121,83,81,'76');
        -> 'MySQL'
mysql> SELECT CHAR(77,77.3,'77.3');
        -> 'MMM'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html¬ 2   DATETIME RDATETIME

A date and time combination. The supported range is '1000-01-01
00:00:00' to '9999-12-31 23:59:59'. MySQL displays DATETIME values in
'YYYY-MM-DD HH:MM:SS' format, but allows assignment of values to
DATETIME columns using either strings or numbers.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-type-overview.html

Ghttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-type-overview.html Ä 2   OPEN … Syntax:
OPEN cursor_name

This statement opens a previously declared cursor.

URL: http://dev.mysql.com/doc/refman/5.0/en/open.html

0http://dev.mysql.com/doc/refman/5.0/en/open.html"   SHOW CREATE PROCEDURE ^Syntax:
SHOW CREATE PROCEDURE proc_name

This statement is a MySQL extension. It returns the exact string that
can be used to re-create the named stored procedure. A similar
statement, SHOW CREATE FUNCTION, displays information about stored
functions (see [HELP SHOW CREATE FUNCTION]).

Both statements require that you be the owner of the routine or have
SELECT access to the mysql.proc table. If you do not have privileges
for the routine itself, the value displayed for the Create Procedure or
Create Function field will be NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-create-procedure.html

Ymysql> SHOW CREATE PROCEDURE test.simpleproc\G
*************************** 1. row ***************************
       Procedure: simpleproc
        sql_mode:
Create Procedure: CREATE PROCEDURE `simpleproc`(OUT param1 INT)
                  BEGIN
                  SELECT COUNT(*) INTO param1 FROM t;
                  END

mysql> SHOW CREATE FUNCTION test.hello\G
*************************** 1. row ***************************
       Function: hello
       sql_mode:
Create Function: CREATE FUNCTION `hello`(s CHAR(20))
                 RETURNS CHAR(50)
                 RETURN CONCAT('Hello, ',s,'!')
Ahttp://dev.mysql.com/doc/refman/5.0/en/show-create-procedure.html   ŕ 2   INTEGER Ť INTEGER[(M)] [UNSIGNED] [ZEROFILL]

This type is a synonym for INT.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html™2   LOWER" MSyntax:
LOWER(str)

Returns the string str with all characters changed to lowercase
according to the current character set mapping. The default is latin1
(cp1252 West European).

mysql> SELECT LOWER('QUADRATICALLY');
        -> 'quadratically'

LOWER() (and UPPER()) are ineffective when applied to binary strings
(BINARY, VARBINARY, BLOB). To perform lettercase conversion, convert
the string to a nonbinary string:

mysql> SET @str = BINARY 'New York';
mysql> SELECT LOWER(@str), LOWER(CONVERT(@str USING latin1));
+-------------+-----------------------------------+
| LOWER(@str) | LOWER(CONVERT(@str USING latin1)) |
+-------------+-----------------------------------+
| New York    | new york                          |
+-------------+-----------------------------------+

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html.2   SHOW COLUMNS ßSyntax:
SHOW [FULL] COLUMNS {FROM | IN} tbl_name [{FROM | IN} db_name]
    [LIKE 'pattern' | WHERE expr]

SHOW COLUMNS displays information about the columns in a given table.
It also works for views as of MySQL 5.0.1. The LIKE clause, if present,
indicates which column names to match. The WHERE clause can be given to
select rows using more general conditions, as discussed in
http://dev.mysql.com/doc/refman/5.0/en/extended-show.html.

mysql> SHOW COLUMNS FROM City;
+------------+----------+------+-----+---------+----------------+
| Field      | Type     | Null | Key | Default | Extra          |
+------------+----------+------+-----+---------+----------------+
| Id         | int(11)  | NO   | PRI | NULL    | auto_increment |
| Name       | char(35) | NO   |     |         |                |
| Country    | char(3)  | NO   | UNI |         |                |
| District   | char(20) | YES  | MUL |         |                |
| Population | int(11)  | NO   |     | 0       |                |
+------------+----------+------+-----+---------+----------------+
5 rows in set (0.00 sec)

If the data types differ from what you expect them to be based on a
CREATE TABLE statement, note that MySQL sometimes changes data types
when you create or alter a table. The conditions under which this
occurs are described in
http://dev.mysql.com/doc/refman/5.0/en/silent-column-changes.html.

The FULL keyword causes the output to include the column collation and
comments, as well as the privileges you have for each column.

You can use db_name.tbl_name as an alternative to the tbl_name FROM
db_name syntax. In other words, these two statements are equivalent:

mysql> SHOW COLUMNS FROM mytable FROM mydb;
mysql> SHOW COLUMNS FROM mydb.mytable;

SHOW COLUMNS displays the following values for each table column:

Field indicates the column name.

Type indicates the column data type.

Collation indicates the collation for nonbinary string columns, or NULL
for other columns. This value is displayed only if you use the FULL
keyword.

The Null field contains YES if NULL values can be stored in the column.
If not, the column contains NO as of MySQL 5.0.3, and '' before that.

The Key field indicates whether the column is indexed:

o If Key is empty, the column either is not indexed or is indexed only
  as a secondary column in a multiple-column, nonunique index.

o If Key is PRI, the column is a PRIMARY KEY or is one of the columns
  in a multiple-column PRIMARY KEY.

o If Key is UNI, the column is the first column of a unique-valued
  index that cannot contain NULL values.

o If Key is MUL, multiple occurrences of a given value are allowed
  within the column. The column is the first column of a nonunique
  index or a unique-valued index that can contain NULL values.

If more than one of the Key values applies to a given column of a
table, Key displays the one with the highest priority, in the order
PRI, UNI, MUL.

A UNIQUE index may be displayed as PRI if it cannot contain NULL values
and there is no PRIMARY KEY in the table. A UNIQUE index may display as
MUL if several columns form a composite UNIQUE index; although the
combination of the columns is unique, each column can still hold
multiple occurrences of a given value.

Before MySQL 5.0.11, if the column allows NULL values, the Key value
can be MUL even when a single-column UNIQUE index is used. The
rationale was that multiple rows in a UNIQUE index can hold a NULL
value if the column is not declared NOT NULL. As of MySQL 5.0.11, the
display is UNI rather than MUL regardless of whether the column allows
NULL; you can see from the Null field whether or not the column can
contain NULL.

The Default field indicates the default value that is assigned to the
column.

The Extra field contains any additional information that is available
about a given column. The value is auto_increment if the column was
created with the AUTO_INCREMENT keyword and empty otherwise.

Privileges indicates the privileges you have for the column. This value
is displayed only if you use the FULL keyword.

Comment indicates any comment the column has. This value is displayed
only if you use the FULL keyword.

SHOW FIELDS is a synonym for SHOW COLUMNS. You can also list a table's
columns with the mysqlshow db_name tbl_name command.

The DESCRIBE statement provides information similar to SHOW COLUMNS.
See [HELP DESCRIBE].

The SHOW CREATE TABLE, SHOW TABLE STATUS, and SHOW INDEX statements
also provide information about tables. See [HELP SHOW].

URL: http://dev.mysql.com/doc/refman/5.0/en/show-columns.html

8http://dev.mysql.com/doc/refman/5.0/en/show-columns.html  †2   CREATE TRIGGER$ 3Syntax:
CREATE
    [DEFINER = { user | CURRENT_USER }]
    TRIGGER trigger_name trigger_time trigger_event
    ON tbl_name FOR EACH ROW trigger_stmt

This statement creates a new trigger. A trigger is a named database
object that is associated with a table, and that activates when a
particular event occurs for the table. The trigger becomes associated
with the table named tbl_name, which must refer to a permanent table.
You cannot associate a trigger with a TEMPORARY table or a view. CREATE
TRIGGER was added in MySQL 5.0.2.

In MySQL 5.0 CREATE TRIGGER requires the SUPER privilege.

The DEFINER clause determines the security context to be used when
checking access privileges at trigger activation time.

trigger_time is the trigger action time. It can be BEFORE or AFTER to
indicate that the trigger activates before or after each row to be
modified.

trigger_event indicates the kind of statement that activates the
trigger. The trigger_event can be one of the following:

o INSERT: The trigger is activated whenever a new row is inserted into
  the table; for example, through INSERT, LOAD DATA, and REPLACE
  statements.

o UPDATE: The trigger is activated whenever a row is modified; for
  example, through UPDATE statements.

o DELETE: The trigger is activated whenever a row is deleted from the
  table; for example, through DELETE and REPLACE statements. However,
  DROP TABLE and TRUNCATE statements on the table do not activate this
  trigger, because they do not use DELETE. See [HELP TRUNCATE TABLE].

URL: http://dev.mysql.com/doc/refman/5.0/en/create-trigger.html

:http://dev.mysql.com/doc/refman/5.0/en/create-trigger.html  € "   MONTH ű Syntax:
MONTH(date)

Returns the month for date, in the range 1 to 12 for January to
December, or 0 for dates such as '0000-00-00' or '2008-00-00' that have
a zero month part.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

0 mysql> SELECT MONTH('2008-02-03');
        -> 2
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html2   TINYINT Ä TINYINT[(M)] [UNSIGNED] [ZEROFILL]

A very small integer. The signed range is -128 to 127. The unsigned
range is 0 to 255.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html d 2   SHOW TRIGGERS Syntax:
SHOW TRIGGERS [{FROM | IN} db_name]
    [LIKE 'pattern' | WHERE expr]

SHOW TRIGGERS lists the triggers currently defined for tables in a
database (the default database unless a FROM clause is given). This
statement requires the SUPER privilege. It was implemented in MySQL
5.0.10. The LIKE clause, if present, indicates which table names to
match and causes the statement to display triggers for those tables.
The WHERE clause can be given to select rows using more general
conditions, as discussed in
http://dev.mysql.com/doc/refman/5.0/en/extended-show.html.

For the trigger ins_sum as defined in
http://dev.mysql.com/doc/refman/5.0/en/triggers.html, the output of
this statement is as shown here:

mysql> SHOW TRIGGERS LIKE 'acc%'\G
*************************** 1. row ***************************
  Trigger: ins_sum
    Event: INSERT
    Table: account
Statement: SET @sum = @sum + NEW.amount
   Timing: BEFORE
  Created: NULL
 sql_mode:
  Definer: myname@localhost

URL: http://dev.mysql.com/doc/refman/5.0/en/show-triggers.html

9http://dev.mysql.com/doc/refman/5.0/en/show-triggers.html.2   MASTER_POS_WAIT ŃSyntax:
MASTER_POS_WAIT(log_name,log_pos[,timeout])

This function is useful for control of master/slave synchronization. It
blocks until the slave has read and applied all updates up to the
specified position in the master log. The return value is the number of
log events the slave had to wait for to advance to the specified
position. The function returns NULL if the slave SQL thread is not
started, the slave's master information is not initialized, the
arguments are incorrect, or an error occurs. It returns -1 if the
timeout has been exceeded. If the slave SQL thread stops while
MASTER_POS_WAIT() is waiting, the function returns NULL. If the slave
is past the specified position, the function returns immediately.

If a timeout value is specified, MASTER_POS_WAIT() stops waiting when
timeout seconds have elapsed. timeout must be greater than 0; a zero or
negative timeout means no timeout.

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html  ˝"   REGEXP" \Syntax:
expr REGEXP pat, expr RLIKE pat

Performs a pattern match of a string expression expr against a pattern
pat. The pattern can be an extended regular expression. The syntax for
regular expressions is discussed in
http://dev.mysql.com/doc/refman/5.0/en/regexp.html. Returns 1 if expr
matches pat; otherwise it returns 0. If either expr or pat is NULL, the
result is NULL. RLIKE is a synonym for REGEXP, provided for mSQL
compatibility.

The pattern need not be a literal string. For example, it can be
specified as a string expression or table column.

*Note*: Because MySQL uses the C escape syntax in strings (for example,
"\n" to represent the newline character), you must double any "\" that
you use in your REGEXP strings.

REGEXP is not case sensitive, except when used with binary strings.

URL: http://dev.mysql.com/doc/refman/5.0/en/regexp.html

mysql> SELECT 'Monty!' REGEXP 'm%y%%';
        -> 0
mysql> SELECT 'Monty!' REGEXP '.*';
        -> 1
mysql> SELECT 'new*\n*line' REGEXP 'new\\*.\\*line';
        -> 1
mysql> SELECT 'a' REGEXP 'A', 'a' REGEXP BINARY 'A';
        -> 1  0
mysql> SELECT 'a' REGEXP '^[a-d]';
        -> 1
2http://dev.mysql.com/doc/refman/5.0/en/regexp.htmlŃ2   IF STATEMENT ‚Syntax:
IF search_condition THEN statement_list
    [ELSEIF search_condition THEN statement_list] ...
    [ELSE statement_list]
END IF

IF implements a basic conditional construct. If the search_condition
evaluates to true, the corresponding SQL statement list is executed. If
no search_condition matches, the statement list in the ELSE clause is
executed. Each statement_list consists of one or more statements.

*Note*: There is also an IF() function, which differs from the IF
statement described here. See
http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/if-statement.html

8http://dev.mysql.com/doc/refman/5.0/en/if-statement.html"   ^ Y Syntax:
^

Bitwise XOR:

URL: http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html

g mysql> SELECT 1 ^ 1;
        -> 0
mysql> SELECT 1 ^ 0;
        -> 1
mysql> SELECT 11 ^ 3;
        -> 8
9http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html ÷2   	DROP VIEW$ ®Syntax:
DROP VIEW [IF EXISTS]
    view_name [, view_name] ...
    [RESTRICT | CASCADE]

DROP VIEW removes one or more views. You must have the DROP privilege
for each view. If any of the views named in the argument list do not
exist, MySQL returns an error indicating by name which nonexisting
views it was unable to drop, but it also drops all of the views in the
list that do exist.

The IF EXISTS clause prevents an error from occurring for views that
don't exist. When this clause is given, a NOTE is generated for each
nonexistent view. See [HELP SHOW WARNINGS].

RESTRICT and CASCADE, if given, are parsed and ignored.

URL: http://dev.mysql.com/doc/refman/5.0/en/drop-view.html

5http://dev.mysql.com/doc/refman/5.0/en/drop-view.html j2   WITHIN ń Within(g1,g2)

Returns 1 or 0 to indicate whether g1 is spatially within g2. This
tests the opposite relationship as Contains().

URL: http://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html

hhttp://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html  	"   WEEK ňSyntax:
WEEK(date[,mode])

This function returns the week number for date. The two-argument form
of WEEK() allows you to specify whether the week starts on Sunday or
Monday and whether the return value should be in the range from 0 to 53
or from 1 to 53. If the mode argument is omitted, the value of the
default_week_format system variable is used. See
http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Ă mysql> SELECT WEEK('2008-02-20');
        -> 7
mysql> SELECT WEEK('2008-02-20',0);
        -> 7
mysql> SELECT WEEK('2008-02-20',1);
        -> 8
mysql> SELECT WEEK('2008-12-31',1);
        -> 53
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlë2   DROP FUNCTION UDF ’Syntax:
DROP FUNCTION function_name

This statement drops the user-defined function (UDF) named
function_name.

To drop a function, you must have the DELETE privilege for the mysql
database. This is because DROP FUNCTION removes a row from the
mysql.func system table that records the function's name, type, and
shared library name.

URL: http://dev.mysql.com/doc/refman/5.0/en/drop-function-udf.html

=http://dev.mysql.com/doc/refman/5.0/en/drop-function-udf.html M2   PREPARE Syntax:
PREPARE stmt_name FROM preparable_stmt

The PREPARE statement prepares a statement and assigns it a name,
stmt_name, by which to refer to the statement later. Statement names
are not case sensitive. preparable_stmt is either a string literal or a
user variable that contains the text of the statement. The text must
represent a single SQL statement, not multiple statements. Within the
statement, "?" characters can be used as parameter markers to indicate
where data values are to be bound to the query later when you execute
it. The "?" characters should not be enclosed within quotes, even if
you intend to bind them to string values. Parameter markers can be used
only where data values should appear, not for SQL keywords,
identifiers, and so forth.

If a prepared statement with the given name already exists, it is
deallocated implicitly before the new statement is prepared. This means
that if the new statement contains an error and cannot be prepared, an
error is returned and no statement with the given name exists.

A prepared statement is executed with EXECUTE and released with
DEALLOCATE PREPARE.

The scope of a prepared statement is the session within which it is
created. Other sessions cannot see it.

URL: http://dev.mysql.com/doc/refman/5.0/en/prepare.html

3http://dev.mysql.com/doc/refman/5.0/en/prepare.html2   LOCK ÔSyntax:
LOCK TABLES
    tbl_name [[AS] alias] lock_type
    [, tbl_name [[AS] alias] lock_type] ...

lock_type:
    READ [LOCAL]
  | [LOW_PRIORITY] WRITE

UNLOCK TABLES

MySQL enables client sessions to acquire table locks explicitly for the
purpose of cooperating with other sessions for access to tables, or to
prevent other sessions from modifying tables during periods when a
session requires exclusive access to them. A session can acquire or
release locks only for itself. One session cannot acquire locks for
another session or release locks held by another session.

Locks may be used to emulate transactions or to get more speed when
updating tables. This is explained in more detail later in this
section.

LOCK TABLES explicitly acquires table locks for the current client
session. Table locks can be acquired for base tables or (as of MySQL
5.0.6) views. You must have the LOCK TABLES privilege, and the SELECT
privilege for each object to be locked.

For view locking, LOCK TABLES adds all base tables used in the view to
the set of tables to be locked and locks them automatically. If you
lock a table explicitly with LOCK TABLES, any tables used in triggers
are also locked implicitly, as described in
http://dev.mysql.com/doc/refman/5.0/en/lock-tables-and-triggers.html.

UNLOCK TABLES explicitly releases any table locks held by the current
session.

Another use for UNLOCK TABLES is to release the global read lock
acquired with the FLUSH TABLES WITH READ LOCK statement, which enables
you to lock all tables in all databases. See [HELP FLUSH]. (This is a
very convenient way to get backups if you have a file system such as
Veritas that can take snapshots in time.)

URL: http://dev.mysql.com/doc/refman/5.0/en/lock-tables.html

7http://dev.mysql.com/doc/refman/5.0/en/lock-tables.html  32    RESET SLAVE ćSyntax:
RESET SLAVE

RESET SLAVE makes the slave forget its replication position in the
master's binary logs. This statement is meant to be used for a clean
start: It deletes the master.info and relay-log.info files, all the
relay logs, and starts a new relay log.

*Note*: All relay logs are deleted, even if they have not been
completely executed by the slave SQL thread. (This is a condition
likely to exist on a replication slave if you have issued a STOP SLAVE
statement or if the slave is highly loaded.)

Connection information stored in the master.info file is immediately
reset using any values specified in the corresponding startup options.
This information includes values such as master host, master port,
master user, and master password. If the slave SQL thread was in the
middle of replicating temporary tables when it was stopped, and RESET
SLAVE is issued, these replicated temporary tables are deleted on the
slave.

URL: http://dev.mysql.com/doc/refman/5.0/en/reset-slave.html

7http://dev.mysql.com/doc/refman/5.0/en/reset-slave.html K2!   SHOW BINARY LOGS ôSyntax:
SHOW BINARY LOGS
SHOW MASTER LOGS

Lists the binary log files on the server. This statement is used as
part of the procedure described in [HELP PURGE BINARY LOGS], that shows
how to determine which logs can be purged.

mysql> SHOW BINARY LOGS;
+---------------+-----------+
| Log_name      | File_size |
+---------------+-----------+
| binlog.000015 |    724935 |
| binlog.000016 |    733481 |
+---------------+-----------+

URL: http://dev.mysql.com/doc/refman/5.0/en/show-binary-logs.html

<http://dev.mysql.com/doc/refman/5.0/en/show-binary-logs.html ˝2"   POLYGON KPolygon(ls1,ls2,...)

Constructs a Polygon value from a number of LineString or WKB
LineString arguments. If any argument does not represent a LinearRing
(that is, not a closed and simple LineString), the return value is
NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions

`http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions$ "#   MINUTE ” Syntax:
MINUTE(time)

Returns the minute for time, in the range 0 to 59.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

: mysql> SELECT MINUTE('2008-02-03 10:05:03');
        -> 5
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html Ô 2$   DAY  Syntax:
DAY(date)

DAY() is a synonym for DAYOFMONTH().

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html â2%   MID"  Syntax:
MID(str,pos,len)

MID(str,pos,len) is a synonym for SUBSTRING(str,pos,len).

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  ±"&   UUID Syntax:
UUID()

Returns a Universal Unique Identifier (UUID) generated according to
"DCE 1.1: Remote Procedure Call" (Appendix A) CAE (Common Applications
Environment) Specifications published by The Open Group in October 1997
(Document Number C706,
http://www.opengroup.org/public/pubs/catalog/c706.htm).

A UUID is designed as a number that is globally unique in space and
time. Two calls to UUID() are expected to generate two different
values, even if these calls are performed on two separate computers
that are not connected to each other.

A UUID is a 128-bit number represented by a utf8 string of five
hexadecimal numbers in aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee format:

o The first three numbers are generated from a timestamp.

o The fourth number preserves temporal uniqueness in case the timestamp
  value loses monotonicity (for example, due to daylight saving time).

o The fifth number is an IEEE 802 node number that provides spatial
  uniqueness. A random number is substituted if the latter is not
  available (for example, because the host computer has no Ethernet
  card, or we do not know how to find the hardware address of an
  interface on your operating system). In this case, spatial uniqueness
  cannot be guaranteed. Nevertheless, a collision should have very low
  probability.

  Currently, the MAC address of an interface is taken into account only
  on FreeBSD and Linux. On other operating systems, MySQL uses a
  randomly generated 48-bit number.

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

H mysql> SELECT UUID();
        -> '6ccd780c-baba-1026-9564-0040f4311e29'
Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.htmlŠ2'   
LINESTRING LineString(pt1,pt2,...)

Constructs a LineString value from a number of Point or WKB Point
arguments. If the number of arguments is less than two, the return
value is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions

`http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions  ˘2(   SLEEP OSyntax:
SLEEP(duration)

Sleeps (pauses) for the number of seconds given by the duration
argument, then returns 0. If SLEEP() is interrupted, it returns 1. The
duration may have a fractional part given in microseconds. This
function was added in MySQL 5.0.12.

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html  ")   CONNECTION_ID ô Syntax:
CONNECTION_ID()

Returns the connection ID (thread ID) for the connection. Every
connection has an ID that is unique among the set of currently
connected clients.

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

0 mysql> SELECT CONNECTION_ID();
        -> 23786
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html 2*   DELETE ĎSyntax:
Single-table syntax:

DELETE [LOW_PRIORITY] [QUICK] [IGNORE] FROM tbl_name
    [WHERE where_condition]
    [ORDER BY ...]
    [LIMIT row_count]

Multiple-table syntax:

DELETE [LOW_PRIORITY] [QUICK] [IGNORE]
    tbl_name[.*] [, tbl_name[.*]] ...
    FROM table_references
    [WHERE where_condition]

Or:

DELETE [LOW_PRIORITY] [QUICK] [IGNORE]
    FROM tbl_name[.*] [, tbl_name[.*]] ...
    USING table_references
    [WHERE where_condition]

For the single-table syntax, the DELETE statement deletes rows from
tbl_name and returns a count of the number of deleted rows. This count
can be obtained by calling the ROW_COUNT() function (see
http://dev.mysql.com/doc/refman/5.0/en/information-functions.html). The
WHERE clause, if given, specifies the conditions that identify which
rows to delete. With no WHERE clause, all rows are deleted. If the
ORDER BY clause is specified, the rows are deleted in the order that is
specified. The LIMIT clause places a limit on the number of rows that
can be deleted.

For the multiple-table syntax, DELETE deletes from each tbl_name the
rows that satisfy the conditions. In this case, ORDER BY and LIMIT
cannot be used.

where_condition is an expression that evaluates to true for each row to
be deleted. It is specified as described in
http://dev.mysql.com/doc/refman/5.0/en/select.html.

Currently, you cannot delete from a table and select from the same
table in a subquery.

You need the DELETE privilege on a table to delete rows from it. You
need only the SELECT privilege for any columns that are only read, such
as those named in the WHERE clause.

As stated, a DELETE statement with no WHERE clause deletes all rows. A
faster way to do this, when you do not need to know the number of
deleted rows, is to use TRUNCATE TABLE. However, within a transaction
or if you have a lock on the table, TRUNCATE TABLE cannot be used
whereas DELETE can. See [HELP TRUNCATE TABLE], and [HELP LOCK].

URL: http://dev.mysql.com/doc/refman/5.0/en/delete.html

2http://dev.mysql.com/doc/refman/5.0/en/delete.html  ˇ"+   ROUND HSyntax:
ROUND(X), ROUND(X,D)

Rounds the argument X to D decimal places. The rounding algorithm
depends on the data type of X. D defaults to 0 if not specified. D can
be negative to cause D digits left of the decimal point of the value X
to become zero.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

mysql> SELECT ROUND(-1.23);
        -> -1
mysql> SELECT ROUND(-1.58);
        -> -2
mysql> SELECT ROUND(1.58);
        -> 2
mysql> SELECT ROUND(1.298, 1);
        -> 1.3
mysql> SELECT ROUND(1.298, 0);
        -> 1
mysql> SELECT ROUND(23.298, -1);
        -> 20
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html•",   NULLIF í Syntax:
NULLIF(expr1,expr2)

Returns NULL if expr1 = expr2 is true, otherwise returns expr1. This is
the same as CASE WHEN expr1 = expr2 THEN NULL ELSE expr1 END.

URL: http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html

S mysql> SELECT NULLIF(1,1);
        -> NULL
mysql> SELECT NULLIF(1,2);
        -> 1
Bhttp://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html4 2-   CLOSE ó Syntax:
CLOSE cursor_name

This statement closes a previously opened cursor.

If not closed explicitly, a cursor is closed at the end of the compound
statement in which it was declared.

URL: http://dev.mysql.com/doc/refman/5.0/en/close.html

1http://dev.mysql.com/doc/refman/5.0/en/close.html#2.   
STOP SLAVE ŘSyntax:
STOP SLAVE [thread_type [, thread_type] ... ]

thread_type: IO_THREAD | SQL_THREAD

Stops the slave threads. STOP SLAVE requires the SUPER privilege.

Like START SLAVE, this statement may be used with the IO_THREAD and
SQL_THREAD options to name the thread or threads to be stopped.

*Note*: The transactional behavior of STOP SLAVE changed in MySQL
5.0.82. Previously, it took effect immediately; beginning with MySQL
5.0.82, it waits until the current replication event group (if any) has
finished executing, or until the user issues a KILL QUERY or KILL
CONNECTION statement. (Bug#319 (http://bugs.mysql.com/319), Bug#38205
(http://bugs.mysql.com/38205))

URL: http://dev.mysql.com/doc/refman/5.0/en/stop-slave.html

6http://dev.mysql.com/doc/refman/5.0/en/stop-slave.html b"/   TIMEDIFF  Syntax:
TIMEDIFF(expr1,expr2)

TIMEDIFF() returns expr1 - expr2 expressed as a time value. expr1 and
expr2 are time or date-and-time expressions, but both must be of the
same type.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html


mysql> SELECT TIMEDIFF('2000:01:01 00:00:00',
    ->                 '2000:01:01 00:00:00.000001');
        -> '-00:00:00.000001'
mysql> SELECT TIMEDIFF('2008-12-31 23:59:59.000001',
    ->                 '2008-12-30 01:01:01.000002');
        -> '46:58:57.999999'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  ˝"0   REPLACE FUNCTION" Syntax:
REPLACE(str,from_str,to_str)

Returns the string str with all occurrences of the string from_str
replaced by the string to_str. REPLACE() performs a case-sensitive
match when searching for from_str.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

Q mysql> SELECT REPLACE('www.mysql.com', 'w', 'Ww');
        -> 'WwWwWw.mysql.com'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.htmló21   USE ¶Syntax:
USE db_name

The USE db_name statement tells MySQL to use the db_name database as
the default (current) database for subsequent statements. The database
remains the default until the end of the session or another USE
statement is issued:

USE db1;
SELECT COUNT(*) FROM mytable;   # selects from db1.mytable
USE db2;
SELECT COUNT(*) FROM mytable;   # selects from db2.mytable

URL: http://dev.mysql.com/doc/refman/5.0/en/use.html

/http://dev.mysql.com/doc/refman/5.0/en/use.html H 22   LINEFROMTEXT Ü LineFromText(wkt[,srid]), LineStringFromText(wkt[,srid])

Constructs a LINESTRING value using its WKT representation and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functionst "3   CASE OPERATOR Syntax:
CASE value WHEN [compare_value] THEN result [WHEN [compare_value] THEN
result ...] [ELSE result] END

CASE WHEN [condition] THEN result [WHEN [condition] THEN result ...]
[ELSE result] END

The first version returns the result where value=compare_value. The
second version returns the result for the first condition that is true.
If there was no matching result value, the result after ELSE is
returned, or NULL if there is no ELSE part.

URL: http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html

mysql> SELECT CASE 1 WHEN 1 THEN 'one'
    ->     WHEN 2 THEN 'two' ELSE 'more' END;
        -> 'one'
mysql> SELECT CASE WHEN 1>0 THEN 'true' ELSE 'false' END;
        -> 'true'
mysql> SELECT CASE BINARY 'B'
    ->     WHEN 'a' THEN 1 WHEN 'b' THEN 2 END;
        -> NULL
Bhttp://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html±24   SHOW MASTER STATUS VSyntax:
SHOW MASTER STATUS

This statement provides status information about the binary log files
of the master. It requires either the SUPER or REPLICATION CLIENT
privilege.

Example:

mysql> SHOW MASTER STATUS;
+---------------+----------+--------------+------------------+
| File          | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+---------------+----------+--------------+------------------+
| mysql-bin.003 | 73       | test         | manual,mysql     |
+---------------+----------+--------------+------------------+

URL: http://dev.mysql.com/doc/refman/5.0/en/show-master-status.html

>http://dev.mysql.com/doc/refman/5.0/en/show-master-status.html"5   ADDTIME ç Syntax:
ADDTIME(expr1,expr2)

ADDTIME() adds expr2 to expr1 and returns the result. expr1 is a time
or datetime expression, and expr2 is a time expression.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

É mysql> SELECT ADDTIME('2007-12-31 23:59:59.999999', '1 1:1:1.000002');
        -> '2008-01-02 01:01:01.000001'
mysql> SELECT ADDTIME('01:00:00.999999', '02:00:00.999998');
        -> '03:00:01.999997'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html 926   SPATIAL ăMySQL can create spatial indexes using syntax similar to that for
creating regular indexes, but extended with the SPATIAL keyword.
Currently, columns in spatial indexes must be declared NOT NULL. The
following examples demonstrate how to create spatial indexes:

o With CREATE TABLE:

CREATE TABLE geom (g GEOMETRY NOT NULL, SPATIAL INDEX(g));

o With ALTER TABLE:

ALTER TABLE geom ADD SPATIAL INDEX(g);

o With CREATE INDEX:

CREATE SPATIAL INDEX sp_index ON geom (g);

For MyISAM tables, SPATIAL INDEX creates an R-tree index. For storage
engines that support nonspatial indexing of spatial columns, the engine
creates a B-tree index. A B-tree index on spatial values will be useful
for exact-value lookups, but not for range scans.

For more information on indexing spatial columns, see [HELP CREATE
INDEX].

To drop spatial indexes, use ALTER TABLE or DROP INDEX:

o With ALTER TABLE:

ALTER TABLE geom DROP INDEX g;

o With DROP INDEX:

DROP INDEX sp_index ON geom;

Example: Suppose that a table geom contains more than 32,000
geometries, which are stored in the column g of type GEOMETRY. The
table also has an AUTO_INCREMENT column fid for storing object ID
values.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-indexes.html

Dhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-indexes.html‚"7   TIMESTAMPDIFF 5Syntax:
TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2)

Returns datetime_expr2 - datetime_expr1, where datetime_expr1 and
datetime_expr2 are date or datetime expressions. One expression may be
a date and the other a datetime; a date value is treated as a datetime
having the time part '00:00:00' where necessary. The unit for the
result (an integer) is given by the unit argument. The legal values for
unit are the same as those listed in the description of the
TIMESTAMPADD() function.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

đ mysql> SELECT TIMESTAMPDIFF(MONTH,'2003-02-01','2003-05-01');
        -> 3
mysql> SELECT TIMESTAMPDIFF(YEAR,'2002-05-01','2001-01-01');
        -> -1
mysql> SELECT TIMESTAMPDIFF(MINUTE,'2003-02-01','2003-05-01 12:05:55');
        -> 128885
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  28   UPPER" ĎSyntax:
UPPER(str)

Returns the string str with all characters changed to uppercase
according to the current character set mapping. The default is latin1
(cp1252 West European).

mysql> SELECT UPPER('Hej');
        -> 'HEJ'

UPPER() is ineffective when applied to binary strings (BINARY,
VARBINARY, BLOB). The description of LOWER() shows how to perform
lettercase conversion of binary strings.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html "9   FROM_UNIXTIME “Syntax:
FROM_UNIXTIME(unix_timestamp), FROM_UNIXTIME(unix_timestamp,format)

Returns a representation of the unix_timestamp argument as a value in
'YYYY-MM-DD HH:MM:SS' or YYYYMMDDHHMMSS.uuuuuu format, depending on
whether the function is used in a string or numeric context. The value
is expressed in the current time zone. unix_timestamp is an internal
timestamp value such as is produced by the UNIX_TIMESTAMP() function.

If format is given, the result is formatted according to the format
string, which is used the same way as listed in the entry for the
DATE_FORMAT() function.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

)mysql> SELECT FROM_UNIXTIME(1196440219);
        -> '2007-11-30 10:30:19'
mysql> SELECT FROM_UNIXTIME(1196440219) + 0;
        -> 20071130103019.000000
mysql> SELECT FROM_UNIXTIME(UNIX_TIMESTAMP(),
    ->                      '%Y %D %M %h:%i:%s %x');
        -> '2007 30th November 10:30:59 2007'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html^2:   
MEDIUMBLOB 	MEDIUMBLOB

A BLOB column with a maximum length of 16,777,215 (224 - 1) bytes. Each
MEDIUMBLOB value is stored using a three-byte length prefix that
indicates the number of bytes in the value.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html  ";   IFNULL Syntax:
IFNULL(expr1,expr2)

If expr1 is not NULL, IFNULL() returns expr1; otherwise it returns
expr2. IFNULL() returns a numeric or string value, depending on the
context in which it is used.

URL: http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html

ł mysql> SELECT IFNULL(1,0);
        -> 1
mysql> SELECT IFNULL(NULL,10);
        -> 10
mysql> SELECT IFNULL(1/0,10);
        -> 10
mysql> SELECT IFNULL(1/0,'yes');
        -> 'yes'
Bhttp://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html ` 2<   SHOW FUNCTION CODE Syntax:
SHOW FUNCTION CODE func_name

This statement is similar to SHOW PROCEDURE CODE but for stored
functions. See [HELP SHOW PROCEDURE CODE]. SHOW FUNCTION CODE was added
in MySQL 5.0.17.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-function-code.html

>http://dev.mysql.com/doc/refman/5.0/en/show-function-code.html‚2=   SHOW ERRORS 5Syntax:
SHOW ERRORS [LIMIT [offset,] row_count]
SHOW COUNT(*) ERRORS

This statement is similar to SHOW WARNINGS, except that instead of
displaying errors, warnings, and notes, it displays only errors.

The LIMIT clause has the same syntax as for the SELECT statement. See
http://dev.mysql.com/doc/refman/5.0/en/select.html.

The SHOW COUNT(*) ERRORS statement displays the number of errors. You
can also retrieve this number from the error_count variable:

SHOW COUNT(*) ERRORS;
SELECT @@error_count;

URL: http://dev.mysql.com/doc/refman/5.0/en/show-errors.html

7http://dev.mysql.com/doc/refman/5.0/en/show-errors.html  ô ">   LEAST Syntax:
LEAST(value1,value2,...)

With two or more arguments, returns the smallest (minimum-valued)
argument. The arguments are compared using the following rules:

o If the return value is used in an INTEGER context or all arguments
  are integer-valued, they are compared as integers.

o If the return value is used in a REAL context or all arguments are
  real-valued, they are compared as reals.

o If any argument is a case-sensitive string, the arguments are
  compared as case-sensitive strings.

o In all other cases, the arguments are compared as case-insensitive
  strings.

Before MySQL 5.0.13, LEAST() returns NULL only if all arguments are
NULL. As of 5.0.13, it returns NULL if any argument is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

 mysql> SELECT LEAST(2,0);
        -> 0
mysql> SELECT LEAST(34.0,3.0,5.0,767.0);
        -> 3.0
mysql> SELECT LEAST('B','A','C');
        -> 'A'
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html\ "?   = R =

Equal:

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

Ľ mysql> SELECT 1 = 0;
        -> 0
mysql> SELECT '0' = 0;
        -> 1
mysql> SELECT '0.0' = 0;
        -> 1
mysql> SELECT '0.01' = 0;
        -> 0
mysql> SELECT '.01' = 0.01;
        -> 1
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html"@   REVERSE" ś Syntax:
REVERSE(str)

Returns the string str with the order of the characters reversed.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

/ mysql> SELECT REVERSE('abc');
        -> 'cba'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html >"A   ISNULL › Syntax:
ISNULL(expr)

If expr is NULL, ISNULL() returns 1, otherwise it returns 0.

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

P mysql> SELECT ISNULL(1+1);
        -> 0
mysql> SELECT ISNULL(1/0);
        -> 1
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html  B2B   BINARY ń BINARY(M)

The BINARY type is similar to the CHAR type, but stores binary byte
strings rather than nonbinary character strings. M represents the
column length in bytes.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html  =2C   BLOB DATA TYPE ôA BLOB is a binary large object that can hold a variable amount of
data. The four BLOB types are TINYBLOB, BLOB, MEDIUMBLOB, and LONGBLOB.
These differ only in the maximum length of the values they can hold.
The four TEXT types are TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT. These
correspond to the four BLOB types and have the same maximum lengths and
storage requirements. See
http://dev.mysql.com/doc/refman/5.0/en/storage-requirements.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/blob.html

0http://dev.mysql.com/doc/refman/5.0/en/blob.html\ 2D   BOUNDARY! Ţ Boundary(g)

Returns a geometry that is the closure of the combinatorial boundary of
the geometry value g.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions

khttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functionsé2E   CREATE USER śSyntax:
CREATE USER user [IDENTIFIED BY [PASSWORD] 'password']
    [, user [IDENTIFIED BY [PASSWORD] 'password']] ...

The CREATE USER statement was added in MySQL 5.0.2. This statement
creates new MySQL accounts. To use it, you must have the global CREATE
USER privilege or the INSERT privilege for the mysql database. For each
account, CREATE USER creates a new record in the mysql.user table that
has no privileges. An error occurs if the account already exists. Each
account is named using the same format as for the GRANT statement; for
example, 'jeffrey'@'localhost'. If you specify only the user name part
of the account name, a host name part of '%' is used. For additional
information about specifying account names, see [HELP GRANT].

The account can be given a password with the optional IDENTIFIED BY
clause. The user value and the password are given the same way as for
the GRANT statement. In particular, to specify the password in plain
text, omit the PASSWORD keyword. To specify the password as the hashed
value as returned by the PASSWORD() function, include the PASSWORD
keyword. See [HELP GRANT].

URL: http://dev.mysql.com/doc/refman/5.0/en/create-user.html

7http://dev.mysql.com/doc/refman/5.0/en/create-user.html2F   POINT ž Point(x,y)

Constructs a Point using its coordinates.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions

`http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions  Ă"G   CURRENT_USER Syntax:
CURRENT_USER, CURRENT_USER()

Returns the user name and host name combination for the MySQL account
that the server used to authenticate the current client. This account
determines your access privileges. The return value is a string in the
utf8 character set.

The value of CURRENT_USER() can differ from the value of USER().

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

Ń mysql> SELECT USER();
        -> 'davida@localhost'
mysql> SELECT * FROM mysql.user;
ERROR 1044: Access denied for user ''@'localhost' to
database 'mysql'
mysql> SELECT CURRENT_USER();
        -> '@localhost'
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html  Ć2H   LCASE" z Syntax:
LCASE(str)

LCASE() is a synonym for LOWER().

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html   Ü "I   <= h Syntax:
<=

Less than or equal:

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

% mysql> SELECT 0.1 <= 2;
        -> 1
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html "J   SHOW PROFILES ü
Syntax:
SHOW PROFILE [type [, type] ... ]
    [FOR QUERY n]
    [LIMIT row_count [OFFSET offset]]

type:
    ALL
  | BLOCK IO
  | CONTEXT SWITCHES
  | CPU
  | IPC
  | MEMORY
  | PAGE FAULTS
  | SOURCE
  | SWAPS

The SHOW PROFILES and SHOW PROFILE statements display profiling
information that indicates resource usage for statements executed
during the course of the current session.

Profiling is controlled by the profiling session variable, which has a
default value of 0 (OFF). Profiling is enabled by setting profiling to
1 or ON:

mysql> SET profiling = 1;

SHOW PROFILES displays a list of the most recent statements sent to the
master. The size of the list is controlled by the
profiling_history_size session variable, which has a default value of
15. The maximum value is 100. Setting the value to 0 has the practical
effect of disabling profiling.

All statements are profiled except SHOW PROFILES and SHOW PROFILE, so
you will find neither of those statements in the profile list.
Malformed statements are profiled. For example, SHOW PROFILING is an
illegal statement, and a syntax error occurs if you try to execute it,
but it will show up in the profiling list.

SHOW PROFILE displays detailed information about a single statement.
Without the FOR QUERY n clause, the output pertains to the most
recently executed statement. If FOR QUERY n is included, SHOW PROFILE
displays information for statement n. The values of n correspond to the
Query_ID values displayed by SHOW PROFILES.

The LIMIT row_count clause may be given to limit the output to
row_count rows. If LIMIT is given, OFFSET offset may be added to begin
the output offset rows into the full set of rows.

By default, SHOW PROFILE displays Status and Duration columns. The
Status values are like the State values displayed by SHOW PROCESSLIST,
althought there might be some minor differences in interpretion for the
two statements for some status values (see
http://dev.mysql.com/doc/refman/5.0/en/thread-information.html).

Optional type values may be specified to display specific additional
types of information:

o ALL displays all information

o BLOCK IO displays counts for block input and output operations

o CONTEXT SWITCHES displays counts for voluntary and involuntary
  context switches

o CPU displays user and system CPU usage times

o IPC displays counts for messages sent and received

o MEMORY is not currently implemented

o PAGE FAULTS displays counts for major and minor page faults

o SOURCE displays the names of functions from the source code, together
  with the name and line number of the file in which the function
  occurs

o SWAPS displays swap counts

Profiling is enabled per session. When a session ends, its profiling
information is lost.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-profiles.html

Émysql> SELECT @@profiling;
+-------------+
| @@profiling |
+-------------+
|           0 |
+-------------+
1 row in set (0.00 sec)

mysql> SET profiling = 1;
Query OK, 0 rows affected (0.00 sec)

mysql> DROP TABLE IF EXISTS t1;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> CREATE TABLE T1 (id INT);
Query OK, 0 rows affected (0.01 sec)

mysql> SHOW PROFILES;
+----------+----------+--------------------------+
| Query_ID | Duration | Query                    |
+----------+----------+--------------------------+
|        0 | 0.000088 | SET PROFILING = 1        |
|        1 | 0.000136 | DROP TABLE IF EXISTS t1  |
|        2 | 0.011947 | CREATE TABLE t1 (id INT) |
+----------+----------+--------------------------+
3 rows in set (0.00 sec)

mysql> SHOW PROFILE;
+----------------------+----------+
| Status               | Duration |
+----------------------+----------+
| checking permissions | 0.000040 |
| creating table       | 0.000056 |
| After create         | 0.011363 |
| query end            | 0.000375 |
| freeing items        | 0.000089 |
| logging slow query   | 0.000019 |
| cleaning up          | 0.000005 |
+----------------------+----------+
7 rows in set (0.00 sec)

mysql> SHOW PROFILE FOR QUERY 1;
+--------------------+----------+
| Status             | Duration |
+--------------------+----------+
| query end          | 0.000107 |
| freeing items      | 0.000008 |
| logging slow query | 0.000015 |
| cleaning up        | 0.000006 |
+--------------------+----------+
4 rows in set (0.00 sec)

mysql> SHOW PROFILE CPU FOR QUERY 2;
+----------------------+----------+----------+------------+
| Status               | Duration | CPU_user | CPU_system |
+----------------------+----------+----------+------------+
| checking permissions | 0.000040 | 0.000038 |   0.000002 |
| creating table       | 0.000056 | 0.000028 |   0.000028 |
| After create         | 0.011363 | 0.000217 |   0.001571 |
| query end            | 0.000375 | 0.000013 |   0.000028 |
| freeing items        | 0.000089 | 0.000010 |   0.000014 |
| logging slow query   | 0.000019 | 0.000009 |   0.000010 |
| cleaning up          | 0.000005 | 0.000003 |   0.000002 |
+----------------------+----------+----------+------------+
7 rows in set (0.00 sec)
9http://dev.mysql.com/doc/refman/5.0/en/show-profiles.htmlé2K   UPDATE ¦Syntax:
Single-table syntax:

UPDATE [LOW_PRIORITY] [IGNORE] table_reference
    SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...
    [WHERE where_condition]
    [ORDER BY ...]
    [LIMIT row_count]

Multiple-table syntax:

UPDATE [LOW_PRIORITY] [IGNORE] table_references
    SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...
    [WHERE where_condition]

For the single-table syntax, the UPDATE statement updates columns of
existing rows in the named table with new values. The SET clause
indicates which columns to modify and the values they should be given.
Each value can be given as an expression, or the keyword DEFAULT to set
a column explicitly to its default value. The WHERE clause, if given,
specifies the conditions that identify which rows to update. With no
WHERE clause, all rows are updated. If the ORDER BY clause is
specified, the rows are updated in the order that is specified. The
LIMIT clause places a limit on the number of rows that can be updated.

For the multiple-table syntax, UPDATE updates rows in each table named
in table_references that satisfy the conditions. In this case, ORDER BY
and LIMIT cannot be used.

where_condition is an expression that evaluates to true for each row to
be updated.

table_references and where_condition are is specified as described in
http://dev.mysql.com/doc/refman/5.0/en/select.html.

You need the UPDATE privilege only for columns referenced in an UPDATE
that are actually updated. You need only the SELECT privilege for any
columns that are read but not modified.

The UPDATE statement supports the following modifiers:

o If you use the LOW_PRIORITY keyword, execution of the UPDATE is
  delayed until no other clients are reading from the table. This
  affects only storage engines that use only table-level locking
  (MyISAM, MEMORY, MERGE).

o If you use the IGNORE keyword, the update statement does not abort
  even if errors occur during the update. Rows for which duplicate-key
  conflicts occur are not updated. Rows for which columns are updated
  to values that would cause data conversion errors are updated to the
  closest valid values instead.

URL: http://dev.mysql.com/doc/refman/5.0/en/update.html

2http://dev.mysql.com/doc/refman/5.0/en/update.html)"L   IS NOT NULL € Syntax:
IS NOT NULL

Tests whether a value is not NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

Q mysql> SELECT 1 IS NOT NULL, 0 IS NOT NULL, NULL IS NOT NULL;
        -> 1, 1, 0
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.htmlż2M   CASE STATEMENT lSyntax:
CASE case_value
    WHEN when_value THEN statement_list
    [WHEN when_value THEN statement_list] ...
    [ELSE statement_list]
END CASE

Or:

CASE
    WHEN search_condition THEN statement_list
    [WHEN search_condition THEN statement_list] ...
    [ELSE statement_list]
END CASE

The CASE statement for stored programs implements a complex conditional
construct. If a search_condition evaluates to true, the corresponding
SQL statement list is executed. If no search condition matches, the
statement list in the ELSE clause is executed. Each statement_list
consists of one or more statements.

If no when_value or search_condition matches the value tested and the
CASE statement contains no ELSE clause, a Case not found for CASE
statement error results.

Each statement_list consists of one or more statements; an empty
statement_list is not allowed. To handle situations where no value is
matched by any WHEN clause, use an ELSE containing an empty BEGIN ...
END block, as shown in this example: DELIMITER | CREATE PROCEDURE p()
BEGIN DECLARE v INT DEFAULT 1; CASE v WHEN 2 THEN SELECT v; WHEN 3 THEN
SELECT 0; ELSE BEGIN END; END CASE; END; | (The indentation used here
in the ELSE clause is for purposes of clarity only, and is not
otherwise significant.)

*Note*: The syntax of the CASE statement used inside stored programs
differs slightly from that of the SQL CASE expression described in
http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html. The
CASE statement cannot have an ELSE NULL clause, and it is terminated
with END CASE instead of END.

URL: http://dev.mysql.com/doc/refman/5.0/en/case-statement.html

:http://dev.mysql.com/doc/refman/5.0/en/case-statement.html =2N   EXECUTE STATEMENT îSyntax:
EXECUTE stmt_name
    [USING @var_name [, @var_name] ...]

After preparing a statement with PREPARE, you execute it with an
EXECUTE statement that refers to the prepared statement name. If the
prepared statement contains any parameter markers, you must supply a
USING clause that lists user variables containing the values to be
bound to the parameters. Parameter values can be supplied only by user
variables, and the USING clause must name exactly as many variables as
the number of parameter markers in the statement.

You can execute a given prepared statement multiple times, passing
different variables to it or setting the variables to different values
before each execution.

URL: http://dev.mysql.com/doc/refman/5.0/en/execute.html

3http://dev.mysql.com/doc/refman/5.0/en/execute.htmlY2O   
DROP INDEX$ Syntax:
DROP INDEX index_name ON tbl_name

DROP INDEX drops the index named index_name from the table tbl_name.
This statement is mapped to an ALTER TABLE statement to drop the index.
See [HELP ALTER TABLE].

URL: http://dev.mysql.com/doc/refman/5.0/en/drop-index.html

6http://dev.mysql.com/doc/refman/5.0/en/drop-index.htmlż"P   MATCH AGAINST" đ	Syntax:
MATCH (col1,col2,...) AGAINST (expr [search_modifier])

MySQL has support for full-text indexing and searching:

o A full-text index in MySQL is an index of type FULLTEXT.

o Full-text indexes can be used only with MyISAM tables, and can be
  created only for CHAR, VARCHAR, or TEXT columns.

o A FULLTEXT index definition can be given in the CREATE TABLE
  statement when a table is created, or added later using ALTER TABLE
  or CREATE INDEX.

o For large data sets, it is much faster to load your data into a table
  that has no FULLTEXT index and then create the index after that, than
  to load data into a table that has an existing FULLTEXT index.

Full-text searching is performed using MATCH() ... AGAINST syntax.
MATCH() takes a comma-separated list that names the columns to be
searched. AGAINST takes a string to search for, and an optional
modifier that indicates what type of search to perform. The search
string must be a literal string, not a variable or a column name. There
are three types of full-text searches:

o A boolean search interprets the search string using the rules of a
  special query language. The string contains the words to search for.
  It can also contain operators that specify requirements such that a
  word must be present or absent in matching rows, or that it should be
  weighted higher or lower than usual. Common words such as "some" or
  "then" are stopwords and do not match if present in the search
  string. The IN BOOLEAN MODE modifier specifies a boolean search. For
  more information, see
  http://dev.mysql.com/doc/refman/5.0/en/fulltext-boolean.html.

o A natural language search interprets the search string as a phrase in
  natural human language (a phrase in free text). There are no special
  operators. The stopword list applies. In addition, words that are
  present in 50% or more of the rows are considered common and do not
  match. Full-text searches are natural language searches if no
  modifier is given.

o A query expansion search is a modification of a natural language
  search. The search string is used to perform a natural language
  search. Then words from the most relevant rows returned by the search
  are added to the search string and the search is done again. The
  query returns the rows from the second search. The WITH QUERY
  EXPANSION modifier specifies a query expansion search. For more
  information, see
  http://dev.mysql.com/doc/refman/5.0/en/fulltext-query-expansion.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/fulltext-search.html

zmysql> SELECT id, body, MATCH (title,body) AGAINST
    -> ('Security implications of running MySQL as root') AS score
    -> FROM articles WHERE MATCH (title,body) AGAINST
    -> ('Security implications of running MySQL as root');
+----+-------------------------------------+-----------------+
| id | body                                | score           |
+----+-------------------------------------+-----------------+
|  4 | 1. Never run mysqld as root. 2. ... | 1.5219271183014 |
|  6 | When configured properly, MySQL ... | 1.3114095926285 |
+----+-------------------------------------+-----------------+
2 rows in set (0.00 sec)
;http://dev.mysql.com/doc/refman/5.0/en/fulltext-search.html "Q   ABS { Syntax:
ABS(X)

Returns the absolute value of X.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

I mysql> SELECT ABS(2);
        -> 2
mysql> SELECT ABS(-32);
        -> 32
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html  ?2R   POLYFROMWKB Ô PolyFromWKB(wkb[,srid]), PolygonFromWKB(wkb[,srid])

Constructs a POLYGON value using its WKB representation and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions 2S   NOT LIKE" Á Syntax:
expr NOT LIKE pat [ESCAPE 'escape_char']

This is the same as NOT (expr LIKE pat [ESCAPE 'escape_char']).

URL: http://dev.mysql.com/doc/refman/5.0/en/string-comparison-functions.html

Ghttp://dev.mysql.com/doc/refman/5.0/en/string-comparison-functions.html "T   SPACE" ‰ Syntax:
SPACE(N)

Returns a string consisting of N space characters.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

, mysql> SELECT SPACE(6);
        -> '      '
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html ` "U   MBR DEFINITION Í Its MBR (Minimum Bounding Rectangle), or Envelope. This is the bounding
geometry, formed by the minimum and maximum (X,Y) coordinates:

URL: http://dev.mysql.com/doc/refman/5.0/en/gis-class-geometry.html

: ((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX MINY))
>http://dev.mysql.com/doc/refman/5.0/en/gis-class-geometry.html%2V   GEOMETRYCOLLECTION ¨ GeometryCollection(g1,g2,...)

Constructs a GeometryCollection.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions

`http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions­"W   MAX âSyntax:
MAX([DISTINCT] expr)

Returns the maximum value of expr. MAX() may take a string argument; in
such cases, it returns the maximum string value. See
http://dev.mysql.com/doc/refman/5.0/en/mysql-indexes.html. The DISTINCT
keyword can be used to find the maximum of the distinct values of expr,
however, this produces the same result as omitting DISTINCT.

MAX() returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

} mysql> SELECT student_name, MIN(test_score), MAX(test_score)
    ->        FROM student
    ->        GROUP BY student_name;
>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html2X   CREATE FUNCTION UDF ÂSyntax:
CREATE [AGGREGATE] FUNCTION function_name RETURNS {STRING|INTEGER|REAL|DECIMAL}
    SONAME shared_library_name

A user-defined function (UDF) is a way to extend MySQL with a new
function that works like a native (built-in) MySQL function such as
ABS() or CONCAT().

function_name is the name that should be used in SQL statements to
invoke the function. The RETURNS clause indicates the type of the
function's return value. As of MySQL 5.0.3, DECIMAL is a legal value
after RETURNS, but currently DECIMAL functions return string values and
should be written like STRING functions.

shared_library_name is the basename of the shared object file that
contains the code that implements the function. As of MySQL 5.0.67, the
file must be located in the plugin directory. This directory is given
by the value of the plugin_dir system variable. If the value of
plugin_dir is empty, the behavior that is used before 5.0.67 applies:
The file must be located in a directory that is searched by your
system's dynamic linker.

To create a function, you must have the INSERT privilege for the mysql
database. This is necessary because CREATE FUNCTION adds a row to the
mysql.func system table that records the function's name, type, and
shared library name. If you do not have this table, you should run the
mysql_upgrade command to create it. See
http://dev.mysql.com/doc/refman/5.0/en/mysql-upgrade.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/create-function-udf.html

?http://dev.mysql.com/doc/refman/5.0/en/create-function-udf.html v"Y   * c Syntax:
*

Multiplication:

URL: http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html

Ĺ mysql> SELECT 3*5;
        -> 15
mysql> SELECT 18014398509481984*18014398509481984.0;
        -> 324518553658426726783156020576256.0
mysql> SELECT 18014398509481984*18014398509481984;
        -> 0
@http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html    2Z   	TIMESTAMP ETIMESTAMP

A timestamp. The range is '1970-01-01 00:00:01' UTC to '2038-01-09
03:14:07' UTC. TIMESTAMP values are stored as the number of seconds
since the epoch ('1970-01-01 00:00:00' UTC). A TIMESTAMP cannot
represent the value '1970-01-01 00:00:00' because that is equivalent to
0 seconds from the epoch and the value 0 is reserved for representing
'0000-00-00 00:00:00', the "zero" TIMESTAMP value.

A TIMESTAMP column is useful for recording the date and time of an
INSERT or UPDATE operation. By default, the first TIMESTAMP column in a
table is automatically set to the date and time of the most recent
operation if you do not assign it a value yourself. You can also set
any TIMESTAMP column to the current date and time by assigning it a
NULL value. Variations on automatic initialization and update
properties are described in
http://dev.mysql.com/doc/refman/5.0/en/timestamp.html.

A TIMESTAMP value is returned as a string in the format 'YYYY-MM-DD
HH:MM:SS' with a display width fixed at 19 characters. To obtain the
value as a number, you should add +0 to the timestamp column.

*Note*: The TIMESTAMP format that was used prior to MySQL 4.1 is not
supported in MySQL 5.0; see MySQL 3.23, 4.0, 4.1 Reference Manual for
information regarding the old format.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-type-overview.html

Ghttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-type-overview.htmlú2[   DES_DECRYPT
 ¤Syntax:
DES_DECRYPT(crypt_str[,key_str])

Decrypts a string encrypted with DES_ENCRYPT(). If an error occurs,
this function returns NULL.

This function works only if MySQL has been configured with SSL support.
See http://dev.mysql.com/doc/refman/5.0/en/secure-connections.html.

If no key_str argument is given, DES_DECRYPT() examines the first byte
of the encrypted string to determine the DES key number that was used
to encrypt the original string, and then reads the key from the DES key
file to decrypt the message. For this to work, the user must have the
SUPER privilege. The key file can be specified with the --des-key-file
server option.

If you pass this function a key_str argument, that string is used as
the key for decrypting the message.

If the crypt_str argument does not appear to be an encrypted string,
MySQL returns the given crypt_str.

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html  Ş2\   CACHE INDEX ]Syntax:
CACHE INDEX
  tbl_index_list [, tbl_index_list] ...
  IN key_cache_name

tbl_index_list:
  tbl_name [[INDEX|KEY] (index_name[, index_name] ...)]

The CACHE INDEX statement assigns table indexes to a specific key
cache. It is used only for MyISAM tables.

The following statement assigns indexes from the tables t1, t2, and t3
to the key cache named hot_cache:

mysql> CACHE INDEX t1, t2, t3 IN hot_cache;
+---------+--------------------+----------+----------+
| Table   | Op                 | Msg_type | Msg_text |
+---------+--------------------+----------+----------+
| test.t1 | assign_to_keycache | status   | OK       |
| test.t2 | assign_to_keycache | status   | OK       |
| test.t3 | assign_to_keycache | status   | OK       |
+---------+--------------------+----------+----------+

URL: http://dev.mysql.com/doc/refman/5.0/en/cache-index.html

7http://dev.mysql.com/doc/refman/5.0/en/cache-index.html  _"]   ENDPOINT ľ EndPoint(ls)

Returns the Point that is the endpoint of the LineString value ls.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#linestring-property-functions

'mysql> SET @ls = 'LineString(1 1,2 2,3 3)';
mysql> SELECT AsText(EndPoint(GeomFromText(@ls)));
+-------------------------------------+
| AsText(EndPoint(GeomFromText(@ls))) |
+-------------------------------------+
| POINT(3 3)                          |
+-------------------------------------+
ehttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#linestring-property-functions ©"^   COMPRESS
 rSyntax:
COMPRESS(string_to_compress)

Compresses a string and returns the result as a binary string. This
function requires MySQL to have been compiled with a compression
library such as zlib. Otherwise, the return value is always NULL. The
compressed string can be uncompressed with UNCOMPRESS().

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

â mysql> SELECT LENGTH(COMPRESS(REPEAT('a',1000)));
        -> 21
mysql> SELECT LENGTH(COMPRESS(''));
        -> 0
mysql> SELECT LENGTH(COMPRESS('a'));
        -> 13
mysql> SELECT LENGTH(COMPRESS(REPEAT('a',16)));
        -> 15
@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html$ 2_   INSERT áSyntax:
INSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE]
    [INTO] tbl_name [(col_name,...)]
    {VALUES | VALUE} ({expr | DEFAULT},...),(...),...
    [ ON DUPLICATE KEY UPDATE
      col_name=expr
        [, col_name=expr] ... ]

Or:

INSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE]
    [INTO] tbl_name
    SET col_name={expr | DEFAULT}, ...
    [ ON DUPLICATE KEY UPDATE
      col_name=expr
        [, col_name=expr] ... ]

Or:

INSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE]
    [INTO] tbl_name [(col_name,...)]
    SELECT ...
    [ ON DUPLICATE KEY UPDATE
      col_name=expr
        [, col_name=expr] ... ]

INSERT inserts new rows into an existing table. The INSERT ... VALUES
and INSERT ... SET forms of the statement insert rows based on
explicitly specified values. The INSERT ... SELECT form inserts rows
selected from another table or tables. INSERT ... SELECT is discussed
further in [HELP INSERT SELECT].

URL: http://dev.mysql.com/doc/refman/5.0/en/insert.html

2http://dev.mysql.com/doc/refman/5.0/en/insert.html"`   COUNT Syntax:
COUNT(expr)

Returns a count of the number of non-NULL values of expr in the rows
retrieved by a SELECT statement. The result is a BIGINT value.

COUNT() returns 0 if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

¬ mysql> SELECT student.student_name,COUNT(*)
    ->        FROM student,course
    ->        WHERE student.student_id=course.student_id
    ->        GROUP BY student_name;
>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html  t 2a   HANDLER /Syntax:
HANDLER tbl_name OPEN [ [AS] alias]
HANDLER tbl_name READ index_name { = | >= | <= | < } (value1,value2,...)
    [ WHERE where_condition ] [LIMIT ... ]
HANDLER tbl_name READ index_name { FIRST | NEXT | PREV | LAST }
    [ WHERE where_condition ] [LIMIT ... ]
HANDLER tbl_name READ { FIRST | NEXT }
    [ WHERE where_condition ] [LIMIT ... ]
HANDLER tbl_name CLOSE

The HANDLER statement provides direct access to table storage engine
interfaces. It is available for MyISAM and InnoDB tables.

URL: http://dev.mysql.com/doc/refman/5.0/en/handler.html

3http://dev.mysql.com/doc/refman/5.0/en/handler.htmlT 2b   MLINEFROMTEXT ç MLineFromText(wkt[,srid]), MultiLineStringFromText(wkt[,srid])

Constructs a MULTILINESTRING value using its WKT representation and
SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions]2c   GEOMCOLLFROMWKB î GeomCollFromWKB(wkb[,srid]), GeometryCollectionFromWKB(wkb[,srid])

Constructs a GEOMETRYCOLLECTION value using its WKB representation and
SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functionsô "d   RENAME TABLE$ ESyntax:
RENAME TABLE tbl_name TO new_tbl_name
    [, tbl_name2 TO new_tbl_name2] ...

This statement renames one or more tables.

The rename operation is done atomically, which means that no other
session can access any of the tables while the rename is running. For
example, if you have an existing table old_table, you can create
another table new_table that has the same structure but is empty, and
then replace the existing table with the empty one as follows (assuming
that backup_table does not already exist):

URL: http://dev.mysql.com/doc/refman/5.0/en/rename-table.html

^ CREATE TABLE new_table (...);
RENAME TABLE old_table TO backup_table, new_table TO old_table;
8http://dev.mysql.com/doc/refman/5.0/en/rename-table.htmlľ2e   BOOLEAN kBOOL, BOOLEAN

These types are synonyms for TINYINT(1). A value of zero is considered
false. Nonzero values are considered true:

mysql> SELECT IF(0, 'true', 'false');
+------------------------+
| IF(0, 'true', 'false') |
+------------------------+
| false                  |
+------------------------+

mysql> SELECT IF(1, 'true', 'false');
+------------------------+
| IF(1, 'true', 'false') |
+------------------------+
| true                   |
+------------------------+

mysql> SELECT IF(2, 'true', 'false');
+------------------------+
| IF(2, 'true', 'false') |
+------------------------+
| true                   |
+------------------------+

However, the values TRUE and FALSE are merely aliases for 1 and 0,
respectively, as shown here:

mysql> SELECT IF(0 = FALSE, 'true', 'false');
+--------------------------------+
| IF(0 = FALSE, 'true', 'false') |
+--------------------------------+
| true                           |
+--------------------------------+

mysql> SELECT IF(1 = TRUE, 'true', 'false');
+-------------------------------+
| IF(1 = TRUE, 'true', 'false') |
+-------------------------------+
| true                          |
+-------------------------------+

mysql> SELECT IF(2 = TRUE, 'true', 'false');
+-------------------------------+
| IF(2 = TRUE, 'true', 'false') |
+-------------------------------+
| false                         |
+-------------------------------+

mysql> SELECT IF(2 = FALSE, 'true', 'false');
+--------------------------------+
| IF(2 = FALSE, 'true', 'false') |
+--------------------------------+
| false                          |
+--------------------------------+

The last two statements display the results shown because 2 is equal to
neither 1 nor 0.

We intend to implement full boolean type handling, in accordance with
standard SQL, in a future MySQL release.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html  p "f   DEFAULT ä Syntax:
DEFAULT(col_name)

Returns the default value for a table column. Starting with MySQL
5.0.2, an error results if the column has no default value.

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

5 mysql> UPDATE t SET i = DEFAULT(i)+1 WHERE id < 100;
Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html‘"g   MOD § Syntax:
MOD(N,M), N % M, N MOD M

Modulo operation. Returns the remainder of N divided by M.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

 mysql> SELECT MOD(234, 10);
        -> 4
mysql> SELECT 253 % 7;
        -> 1
mysql> SELECT MOD(29,9);
        -> 2
mysql> SELECT 29 MOD 9;
        -> 2
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.htmlŰ2h   TINYTEXT TINYTEXT [CHARACTER SET charset_name] [COLLATE collation_name]

A TEXT column with a maximum length of 255 (28 - 1) characters. The
effective maximum length is less if the value contains multi-byte
characters. Each TINYTEXT value is stored using a one-byte length
prefix that indicates the number of bytes in the value.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html ş2i   OPTIMIZE TABLE gSyntax:
OPTIMIZE [NO_WRITE_TO_BINLOG | LOCAL] TABLE
    tbl_name [, tbl_name] ...

OPTIMIZE TABLE should be used if you have deleted a large part of a
table or if you have made many changes to a table with variable-length
rows (tables that have VARCHAR, VARBINARY, BLOB, or TEXT columns).
Deleted rows are maintained in a linked list and subsequent INSERT
operations reuse old row positions. You can use OPTIMIZE TABLE to
reclaim the unused space and to defragment the data file.

This statement requires SELECT and INSERT privileges for the table.

URL: http://dev.mysql.com/doc/refman/5.0/en/optimize-table.html

:http://dev.mysql.com/doc/refman/5.0/en/optimize-table.html  :2j   DECODE
 é Syntax:
DECODE(crypt_str,pass_str)

Decrypts the encrypted string crypt_str using pass_str as the password.
crypt_str should be a string returned from ENCODE().

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html  ě "k   <=> Syntax:
<=>

NULL-safe equal. This operator performs an equality comparison like the
= operator, but returns 1 rather than NULL if both operands are NULL,
and 0 rather than NULL if one operand is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

Š mysql> SELECT 1 <=> 1, NULL <=> NULL, 1 <=> NULL;
        -> 1, 1, 0
mysql> SELECT 1 = 1, NULL = NULL, 1 = NULL;
        -> 1, NULL, NULL
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.htmlŤ2l   LOAD DATA FROM MASTER ,Syntax:
LOAD DATA FROM MASTER

This feature is deprecated and should be avoided. It is subject to
removal in a future version of MySQL.

Since the current implementation of LOAD DATA FROM MASTER and LOAD
TABLE FROM MASTER is very limited, these statements are deprecated in
versions 4.1 of MySQL and above. We will introduce a more advanced
technique (called "online backup") in a future version. That technique
will have the additional advantage of working with more storage
engines.

For MySQL 5.1 and earlier, the recommended alternative solution to
using LOAD DATA FROM MASTER or LOAD TABLE FROM MASTER is using
mysqldump or mysqlhotcopy. The latter requires Perl and two Perl
modules (DBI and DBD:mysql) and works for MyISAM and ARCHIVE tables
only. With mysqldump, you can create SQL dumps on the master and pipe
(or copy) these to a mysql client on the slave. This has the advantage
of working for all storage engines, but can be quite slow, since it
works using SELECT.

This statement takes a snapshot of the master and copies it to the
slave. It updates the values of MASTER_LOG_FILE and MASTER_LOG_POS so
that the slave starts replicating from the correct position. Any table
and database exclusion rules specified with the --replicate-*-do-* and
--replicate-*-ignore-* options are honored. --replicate-rewrite-db is
not taken into account because a user could use this option to set up a
nonunique mapping such as --replicate-rewrite-db="db1->db3" and
--replicate-rewrite-db="db2->db3", which would confuse the slave when
loading tables from the master.

Use of this statement is subject to the following conditions:

o It works only for MyISAM tables. Attempting to load a non-MyISAM
  table results in the following error:

ERROR 1189 (08S01): Net error reading from master

o It acquires a global read lock on the master while taking the
  snapshot, which prevents updates on the master during the load
  operation.

If you are loading large tables, you might have to increase the values
of net_read_timeout and net_write_timeout on both the master and slave
servers. See
http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html.

Note that LOAD DATA FROM MASTER does not copy any tables from the mysql
database. This makes it easy to have different users and privileges on
the master and the slave.

To use LOAD DATA FROM MASTER, the replication account that is used to
connect to the master must have the RELOAD and SUPER privileges on the
master and the SELECT privilege for all master tables you want to load.
All master tables for which the user does not have the SELECT privilege
are ignored by LOAD DATA FROM MASTER. This is because the master hides
them from the user: LOAD DATA FROM MASTER calls SHOW DATABASES to know
the master databases to load, but SHOW DATABASES returns only databases
for which the user has some privilege. See [HELP SHOW DATABASES]. On
the slave side, the user that issues LOAD DATA FROM MASTER must have
privileges for dropping and creating the databases and tables that are
copied.

URL: http://dev.mysql.com/doc/refman/5.0/en/load-data-from-master.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/load-data-from-master.htmly2m   RESET 8Syntax:
RESET reset_option [, reset_option] ...

The RESET statement is used to clear the state of various server
operations. You must have the RELOAD privilege to execute RESET.

RESET acts as a stronger version of the FLUSH statement. See [HELP
FLUSH].

URL: http://dev.mysql.com/doc/refman/5.0/en/reset.html

1http://dev.mysql.com/doc/refman/5.0/en/reset.htmlG2n   HELP STATEMENT ţSyntax:
HELP 'search_string'

The HELP statement returns online information from the MySQL Reference
manual. Its proper operation requires that the help tables in the mysql
database be initialized with help topic information (see
http://dev.mysql.com/doc/refman/5.0/en/server-side-help-support.html).

The HELP statement searches the help tables for the given search string
and displays the result of the search. The search string is not case
sensitive.

URL: http://dev.mysql.com/doc/refman/5.0/en/help.html

0http://dev.mysql.com/doc/refman/5.0/en/help.html k"o   GET_LOCK Syntax:
GET_LOCK(str,timeout)

Tries to obtain a lock with a name given by the string str, using a
timeout of timeout seconds. Returns 1 if the lock was obtained
successfully, 0 if the attempt timed out (for example, because another
client has previously locked the name), or NULL if an error occurred
(such as running out of memory or the thread was killed with mysqladmin
kill). If you have a lock obtained with GET_LOCK(), it is released when
you execute RELEASE_LOCK(), execute a new GET_LOCK(), or your
connection terminates (either normally or abnormally). Locks obtained
with GET_LOCK() do not interact with transactions. That is, committing
a transaction does not release any such locks obtained during the
transaction.

This function can be used to implement application locks or to simulate
record locks. Names are locked on a server-wide basis. If a name has
been locked by one client, GET_LOCK() blocks any request by another
client for a lock with the same name. This allows clients that agree on
a given lock name to use the name to perform cooperative advisory
locking. But be aware that it also allows a client that is not among
the set of cooperating clients to lock a name, either inadvertently or
deliberately, and thus prevent any of the cooperating clients from
locking that name. One way to reduce the likelihood of this is to use
lock names that are database-specific or application-specific. For
example, use lock names of the form db_name.str or app_name.str.

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

ű mysql> SELECT GET_LOCK('lock1',10);
        -> 1
mysql> SELECT IS_FREE_LOCK('lock2');
        -> 1
mysql> SELECT GET_LOCK('lock2',10);
        -> 1
mysql> SELECT RELEASE_LOCK('lock2');
        -> 1
mysql> SELECT RELEASE_LOCK('lock1');
        -> NULL
Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html  Ć2p   UCASE" z Syntax:
UCASE(str)

UCASE() is a synonym for UPPER().

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  ` 2q   SHOW BINLOG EVENTS Syntax:
SHOW BINLOG EVENTS
   [IN 'log_name'] [FROM pos] [LIMIT [offset,] row_count]

Shows the events in the binary log. If you do not specify 'log_name',
the first binary log is displayed.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-binlog-events.html

>http://dev.mysql.com/doc/refman/5.0/en/show-binlog-events.htmlK2r   MPOLYFROMWKB ß MPolyFromWKB(wkb[,srid]), MultiPolygonFromWKB(wkb[,srid])

Constructs a MULTIPOLYGON value using its WKB representation and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions Ä "s   ITERATE Â Syntax:
ITERATE label

ITERATE can appear only within LOOP, REPEAT, and WHILE statements.
ITERATE means "do the loop again."

URL: http://dev.mysql.com/doc/refman/5.0/en/iterate-statement.html

± CREATE PROCEDURE doiterate(p1 INT)
BEGIN
  label1: LOOP
    SET p1 = p1 + 1;
    IF p1 < 10 THEN ITERATE label1; END IF;
    LEAVE label1;
  END LOOP label1;
  SET @x = p1;
END
=http://dev.mysql.com/doc/refman/5.0/en/iterate-statement.htmlł2t   DO xSyntax:
DO expr [, expr] ...

DO executes the expressions but does not return any results. In most
respects, DO is shorthand for SELECT expr, ..., but has the advantage
that it is slightly faster when you do not care about the result.

DO is useful primarily with functions that have side effects, such as
RELEASE_LOCK().

URL: http://dev.mysql.com/doc/refman/5.0/en/do.html

.http://dev.mysql.com/doc/refman/5.0/en/do.html ŕ "u   CURTIME $Syntax:
CURTIME()

Returns the current time as a value in 'HH:MM:SS' or HHMMSS.uuuuuu
format, depending on whether the function is used in a string or
numeric context. The value is expressed in the current time zone.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

e mysql> SELECT CURTIME();
        -> '23:50:26'
mysql> SELECT CURTIME() + 0;
        -> 235026.000000
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html›2v   CHAR_LENGTH" ISyntax:
CHAR_LENGTH(str)

Returns the length of the string str, measured in characters. A
multi-byte character counts as a single character. This means that for
a string containing five two-byte characters, LENGTH() returns 10,
whereas CHAR_LENGTH() returns 5.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html ‰2w   BIGINT 7BIGINT[(M)] [UNSIGNED] [ZEROFILL]

A large integer. The signed range is -9223372036854775808 to
9223372036854775807. The unsigned range is 0 to 18446744073709551615.

SERIAL is an alias for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html>2x   SET úSyntax:
SET variable_assignment [, variable_assignment] ...

variable_assignment:
      user_var_name = expr
    | [GLOBAL | SESSION] system_var_name = expr
    | [@@global. | @@session. | @@]system_var_name = expr

The SET statement assigns values to different types of variables that
affect the operation of the server or your client. Older versions of
MySQL employed SET OPTION, but this syntax is deprecated in favor of
SET without OPTION.

URL: http://dev.mysql.com/doc/refman/5.0/en/set-option.html

6http://dev.mysql.com/doc/refman/5.0/en/set-option.html  ^"y   CONV ?Syntax:
CONV(N,from_base,to_base)

Converts numbers between different number bases. Returns a string
representation of the number N, converted from base from_base to base
to_base. Returns NULL if any argument is NULL. The argument N is
interpreted as an integer, but may be specified as an integer or a
string. The minimum base is 2 and the maximum base is 36. If to_base is
a negative number, N is regarded as a signed number. Otherwise, N is
treated as unsigned. CONV() works with 64-bit precision.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

Ě mysql> SELECT CONV('a',16,2);
        -> '1010'
mysql> SELECT CONV('6E',18,8);
        -> '172'
mysql> SELECT CONV(-17,10,-18);
        -> '-H'
mysql> SELECT CONV(10+'10'+'10'+0xa,10,10);
        -> '40'
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html  l 2z   DATE DATE

A date. The supported range is '1000-01-01' to '9999-12-31'. MySQL
displays DATE values in 'YYYY-MM-DD' format, but allows assignment of
values to DATE columns using either strings or numbers.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-type-overview.html

Ghttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-type-overview.htmlý2{   SHOW OPEN TABLES ¦Syntax:
SHOW OPEN TABLES [{FROM | IN} db_name]
    [LIKE 'pattern' | WHERE expr]

SHOW OPEN TABLES lists the non-TEMPORARY tables that are currently open
in the table cache. See
http://dev.mysql.com/doc/refman/5.0/en/table-cache.html. The WHERE
clause can be given to select rows using more general conditions, as
discussed in http://dev.mysql.com/doc/refman/5.0/en/extended-show.html.

The FROM and LIKE clauses may be used as of MySQL 5.0.12. The LIKE
clause, if present, indicates which table names to match. The FROM
clause, if present, restricts the tables shown to those present in the
db_name database.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-open-tables.html

<http://dev.mysql.com/doc/refman/5.0/en/show-open-tables.html­"|   EXTRACT Syntax:
EXTRACT(unit FROM date)

The EXTRACT() function uses the same kinds of unit specifiers as
DATE_ADD() or DATE_SUB(), but extracts parts from the date rather than
performing date arithmetic.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Fmysql> SELECT EXTRACT(YEAR FROM '2009-07-02');
       -> 2009
mysql> SELECT EXTRACT(YEAR_MONTH FROM '2009-07-02 01:02:03');
       -> 200907
mysql> SELECT EXTRACT(DAY_MINUTE FROM '2009-07-02 01:02:03');
       -> 20102
mysql> SELECT EXTRACT(MICROSECOND
    ->                FROM '2003-01-02 10:30:00.000123');
        -> 123
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlş"}   ENCRYPT
 +Syntax:
ENCRYPT(str[,salt])

Encrypts str using the Unix crypt() system call and returns a binary
string. The salt argument should be a string with at least two
characters. If no salt argument is given, a random value is used.

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

; mysql> SELECT ENCRYPT('hello');
        -> 'VxuFAJXVARROc'
@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html  ľ2~   SHOW STATUS qSyntax:
SHOW [GLOBAL | SESSION] STATUS
    [LIKE 'pattern' | WHERE expr]

SHOW STATUS provides server status information. This information also
can be obtained using the mysqladmin extended-status command. The LIKE
clause, if present, indicates which variable names to match. The WHERE
clause can be given to select rows using more general conditions, as
discussed in http://dev.mysql.com/doc/refman/5.0/en/extended-show.html.
This statement does not require any privilege. It requires only the
ability to connect to the server.
With a LIKE clause, the statement displays only rows for those
variables with names that match the pattern:

mysql> SHOW STATUS LIKE 'Key%';
+--------------------+----------+
| Variable_name      | Value    |
+--------------------+----------+
| Key_blocks_used    | 14955    |
| Key_read_requests  | 96854827 |
| Key_reads          | 162040   |
| Key_write_requests | 7589728  |
| Key_writes         | 3813196  |
+--------------------+----------+

The GLOBAL and SESSION options are new in MySQL 5.0.2. With the GLOBAL
modifier, SHOW STATUS displays the status values for all connections to
MySQL. With SESSION, it displays the status values for the current
connection. If no modifier is present, the default is SESSION. LOCAL is
a synonym for SESSION.

Some status variables have only a global value. For these, you get the
same value for both GLOBAL and SESSION. The scope for each status
variable is listed at
http://dev.mysql.com/doc/refman/5.0/en/server-status-variables.html.

*Note*: Before MySQL 5.0.2, SHOW STATUS returned global status values.
Because the default as of 5.0.2 is to return session values, this is
incompatible with previous versions. To issue a SHOW STATUS statement
that will retrieve global status values for all versions of MySQL,
write it like this:

SHOW /*!50002 GLOBAL */ STATUS;

URL: http://dev.mysql.com/doc/refman/5.0/en/show-status.html

7http://dev.mysql.com/doc/refman/5.0/en/show-status.html  e2   OLD_PASSWORD
 Syntax:
OLD_PASSWORD(str)

OLD_PASSWORD() was added to MySQL when the implementation of PASSWORD()
was changed to improve security. OLD_PASSWORD() returns the value of
the old (pre-4.1) implementation of PASSWORD() as a binary string, and
is intended to permit you to reset passwords for any pre-4.1 clients
that need to connect to your version 5.0 MySQL server without locking
them out. See
http://dev.mysql.com/doc/refman/5.0/en/password-hashing.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.htmlc2€   SET VARIABLE Syntax:
SET var_name = expr [, var_name = expr] ...

The SET statement in stored programs is an extended version of the
general SET statement (see [HELP SET]). Referenced variables may be
ones declared inside a stored program, global system variables, or
user-defined variables.

The SET statement in stored programs is implemented as part of the
pre-existing SET syntax. This allows an extended syntax of SET a=x,
b=y, ... where different variable types (locally declared variables,
global and session server variables, user-defined variables) can be
mixed. This also allows combinations of local variables and some
options that make sense only for system variables; in that case, the
options are recognized but ignored.

URL: http://dev.mysql.com/doc/refman/5.0/en/set-statement.html

9http://dev.mysql.com/doc/refman/5.0/en/set-statement.html "   FORMAT" Syntax:
FORMAT(X,D)

Formats the number X to a format like '#,###,###.##', rounded to D
decimal places, and returns the result as a string. If D is 0, the
result has no decimal point or fractional part.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

Ż mysql> SELECT FORMAT(12332.123456, 4);
        -> '12,332.1235'
mysql> SELECT FORMAT(12332.1,4);
        -> '12,332.1000'
mysql> SELECT FORMAT(12332.2,0);
        -> '12,332'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.htmlK"‚   || GSyntax:
OR, ||

Logical OR. When both operands are non-NULL, the result is 1 if any
operand is nonzero, and 0 otherwise. With a NULL operand, the result is
1 if the other operand is nonzero, and NULL otherwise. If both operands
are NULL, the result is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/logical-operators.html

¸ mysql> SELECT 1 || 1;
        -> 1
mysql> SELECT 1 || 0;
        -> 1
mysql> SELECT 0 || 0;
        -> 0
mysql> SELECT 0 || NULL;
        -> NULL
mysql> SELECT 1 || NULL;
        -> 1
=http://dev.mysql.com/doc/refman/5.0/en/logical-operators.html "   
BIT_LENGTH" ‹ Syntax:
BIT_LENGTH(str)

Returns the length of the string str in bits.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

0 mysql> SELECT BIT_LENGTH('text');
        -> 32
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  Ż"„   EXTERIORRING Ă ExteriorRing(poly)

Returns the exterior ring of the Polygon value poly as a LineString.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#polygon-property-functions

qmysql> SET @poly =
    -> 'Polygon((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1))';
mysql> SELECT AsText(ExteriorRing(GeomFromText(@poly)));
+-------------------------------------------+
| AsText(ExteriorRing(GeomFromText(@poly))) |
+-------------------------------------------+
| LINESTRING(0 0,0 3,3 3,3 0,0 0)           |
+-------------------------------------------+
bhttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#polygon-property-functions M2…   GEOMFROMWKB â GeomFromWKB(wkb[,srid]), GeometryFromWKB(wkb[,srid])

Constructs a geometry value of any type using its WKB representation
and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functionsw2†   SHOW SLAVE HOSTS  Syntax:
SHOW SLAVE HOSTS

Displays a list of replication slaves currently registered with the
master. Only slaves started with the --report-host=host_name option are
visible in this list.

The list is displayed on any server (not just the master server). The
output looks like this:

mysql> SHOW SLAVE HOSTS;
+------------+-----------+------+-----------+
| Server_id  | Host      | Port | Master_id |
+------------+-----------+------+-----------+
|  192168010 | iconnect2 | 3306 | 192168011 |
| 1921680101 | athena    | 3306 | 192168011 |
+------------+-----------+------+-----------+

o Server_id: The unique server ID of the slave server, as configured in
  the server's option file, or on the command line with
  --server-id=value.

o Host: The host name of the slave server, as configured in the
  server's option file, or on the command line with
  --report-host=host_name. Note that this can differ from the machine
  name as configured in the operating system.

o Port: The port the slave server is listening on.

o Master_id: The unique server ID of the master server that the slave
  server is replicating from.

Some MySQL versions report another variable, Rpl_recovery_rank. This
variable was never used, and was eventually removed.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-slave-hosts.html

<http://dev.mysql.com/doc/refman/5.0/en/show-slave-hosts.html 	´ "‡   START TRANSACTION íSyntax:
START TRANSACTION [WITH CONSISTENT SNAPSHOT] | BEGIN [WORK]
COMMIT [WORK] [AND [NO] CHAIN] [[NO] RELEASE]
ROLLBACK [WORK] [AND [NO] CHAIN] [[NO] RELEASE]
SET autocommit = {0 | 1}

The START TRANSACTION or BEGIN statement begins a new transaction.
COMMIT commits the current transaction, making its changes permanent.
ROLLBACK rolls back the current transaction, canceling its changes. The
SET autocommit statement disables or enables the default autocommit
mode for the current session.

Beginning with MySQL 5.0.3, the optional WORK keyword is supported for
COMMIT and ROLLBACK, as are the CHAIN and RELEASE clauses. CHAIN and
RELEASE can be used for additional control over transaction completion.
The value of the completion_type system variable determines the default
completion behavior. See
http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html.

*Note*: Within stored programs (stored procedures and functions, and
triggers), the parser treats BEGIN [WORK] as the beginning of a BEGIN
... END block. Begin a transaction in this context with START
TRANSACTION instead.

The AND CHAIN clause causes a new transaction to begin as soon as the
current one ends, and the new transaction has the same isolation level
as the just-terminated transaction. The RELEASE clause causes the
server to disconnect the current client session after terminating the
current transaction. Including the NO keyword suppresses CHAIN or
RELEASE completion, which can be useful if the completion_type system
variable is set to cause chaining or release completion by default.

By default, MySQL runs with autocommit mode enabled. This means that as
soon as you execute a statement that updates (modifies) a table, MySQL
stores the update on disk to make it permanent. To disable autocommit
mode, use the following statement:

SET autocommit=0;

After disabling autocommit mode by setting the autocommit variable to
zero, changes to transaction-safe tables (such as those for InnoDB,
BDB, or NDBCLUSTER) are not made permanent immediately. You must use
COMMIT to store your changes to disk or ROLLBACK to ignore the changes.

To disable autocommit mode for a single series of statements, use the
START TRANSACTION statement:

URL: http://dev.mysql.com/doc/refman/5.0/en/commit.html

w START TRANSACTION;
SELECT @A:=SUM(salary) FROM table1 WHERE type=1;
UPDATE table2 SET summary=@A WHERE type=1;
COMMIT;
2http://dev.mysql.com/doc/refman/5.0/en/commit.htmla"   BETWEEN AND Syntax:
expr BETWEEN min AND max

If expr is greater than or equal to min and expr is less than or equal
to max, BETWEEN returns 1, otherwise it returns 0. This is equivalent
to the expression (min <= expr AND expr <= max) if all the arguments
are of the same type. Otherwise type conversion takes place according
to the rules described in
http://dev.mysql.com/doc/refman/5.0/en/type-conversion.html, but
applied to all the three arguments.

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

mysql> SELECT 2 BETWEEN 1 AND 3, 2 BETWEEN 3 and 1;
        -> 1, 0
mysql> SELECT 1 BETWEEN 2 AND 3;
        -> 0
mysql> SELECT 'b' BETWEEN 'a' AND 'c';
        -> 1
mysql> SELECT 2 BETWEEN 2 AND '3';
        -> 1
mysql> SELECT 2 BETWEEN 2 AND 'x-3';
        -> 0
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.htmlN2‰   MULTIPOLYGON × MultiPolygon(poly1,poly2,...)

Constructs a MultiPolygon value from a set of Polygon or WKB Polygon
arguments.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions

`http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions  á"Š   TIME_FORMAT /Syntax:
TIME_FORMAT(time,format)

This is used like the DATE_FORMAT() function, but the format string may
contain format specifiers only for hours, minutes, seconds, and
microseconds. Other specifiers produce a NULL value or 0.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

W mysql> SELECT TIME_FORMAT('100:00:00', '%H %k %h %I %l');
        -> '100 100 04 04 4'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html9"‹   LEFT" µ Syntax:
LEFT(str,len)

Returns the leftmost len characters from the string str, or NULL if any
argument is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

7 mysql> SELECT LEFT('foobarbar', 5);
        -> 'fooba'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.htmlÜ 2Ś   FLUSH QUERY CACHE rYou can defragment the query cache to better utilize its memory with
the FLUSH QUERY CACHE statement. The statement does not remove any
queries from the cache.

The RESET QUERY CACHE statement removes all query results from the
query cache. The FLUSH TABLES statement also does this.

URL: http://dev.mysql.com/doc/refman/5.0/en/query-cache-status-and-maintenance.html

Nhttp://dev.mysql.com/doc/refman/5.0/en/query-cache-status-and-maintenance.htmlŰ2Ť   SET DATA TYPE SET('value1','value2',...) [CHARACTER SET charset_name] [COLLATE
collation_name]

A set. A string object that can have zero or more values, each of which
must be chosen from the list of values 'value1', 'value2', ... A SET
column can have a maximum of 64 members. SET values are represented
internally as integers.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html ©"Ž   RAND ŁSyntax:
RAND(), RAND(N)

Returns a random floating-point value v in the range 0 <= v < 1.0. If a
constant integer argument N is specified, it is used as the seed value,
which produces a repeatable sequence of column values. In the following
example, note that the sequences of values produced by RAND(3) is the
same both places where it occurs.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

łmysql> CREATE TABLE t (i INT);
Query OK, 0 rows affected (0.42 sec)

mysql> INSERT INTO t VALUES(1),(2),(3);
Query OK, 3 rows affected (0.00 sec)
Records: 3  Duplicates: 0  Warnings: 0

mysql> SELECT i, RAND() FROM t;
+------+------------------+
| i    | RAND()           |
+------+------------------+
|    1 | 0.61914388706828 |
|    2 | 0.93845168309142 |
|    3 | 0.83482678498591 |
+------+------------------+
3 rows in set (0.00 sec)

mysql> SELECT i, RAND(3) FROM t;
+------+------------------+
| i    | RAND(3)          |
+------+------------------+
|    1 | 0.90576975597606 |
|    2 | 0.37307905813035 |
|    3 | 0.14808605345719 |
+------+------------------+
3 rows in set (0.00 sec)

mysql> SELECT i, RAND() FROM t;
+------+------------------+
| i    | RAND()           |
+------+------------------+
|    1 | 0.35877890638893 |
|    2 | 0.28941420772058 |
|    3 | 0.37073435016976 |
+------+------------------+
3 rows in set (0.00 sec)

mysql> SELECT i, RAND(3) FROM t;
+------+------------------+
| i    | RAND(3)          |
+------+------------------+
|    1 | 0.90576975597606 |
|    2 | 0.37307905813035 |
|    3 | 0.14808605345719 |
+------+------------------+
3 rows in set (0.01 sec)
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html¸ "Ź   RPAD" 	Syntax:
RPAD(str,len,padstr)

Returns the string str, right-padded with the string padstr to a length
of len characters. If str is longer than len, the return value is
shortened to len characters.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

b mysql> SELECT RPAD('hi',5,'?');
        -> 'hi???'
mysql> SELECT RPAD('hi',1,'?');
        -> 'h'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html!2   CREATE DATABASE$ ĚSyntax:
CREATE {DATABASE | SCHEMA} [IF NOT EXISTS] db_name
    [create_specification] ...

create_specification:
    [DEFAULT] CHARACTER SET [=] charset_name
  | [DEFAULT] COLLATE [=] collation_name

CREATE DATABASE creates a database with the given name. To use this
statement, you need the CREATE privilege for the database. CREATE
SCHEMA is a synonym for CREATE DATABASE as of MySQL 5.0.2.

URL: http://dev.mysql.com/doc/refman/5.0/en/create-database.html

;http://dev.mysql.com/doc/refman/5.0/en/create-database.html~2‘   DEC /DEC[(M[,D])] [UNSIGNED] [ZEROFILL], NUMERIC[(M[,D])] [UNSIGNED]
[ZEROFILL], FIXED[(M[,D])] [UNSIGNED] [ZEROFILL]

These types are synonyms for DECIMAL. The FIXED synonym is available
for compatibility with other database systems.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html  ˙2’   VAR_POP ŻSyntax:
VAR_POP(expr)

Returns the population standard variance of expr. It considers rows as
the whole population, not as a sample, so it has the number of rows as
the denominator. This function was added in MySQL 5.0.3. Before 5.0.3,
you can use VARIANCE(), which is equivalent but is not standard SQL.

VAR_POP() returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html ×"“   ELT" Syntax:
ELT(N,str1,str2,str3,...)

Returns str1 if N = 1, str2 if N = 2, and so on. Returns NULL if N is
less than 1 or greater than the number of arguments. ELT() is the
complement of FIELD().

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

… mysql> SELECT ELT(1, 'ej', 'Heja', 'hej', 'foo');
        -> 'ej'
mysql> SELECT ELT(4, 'ej', 'Heja', 'hej', 'foo');
        -> 'foo'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html @ 2”   
ALTER VIEW$ őSyntax:
ALTER
    [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}]
    [DEFINER = { user | CURRENT_USER }]
    [SQL SECURITY { DEFINER | INVOKER }]
    VIEW view_name [(column_list)]
    AS select_statement
    [WITH [CASCADED | LOCAL] CHECK OPTION]

This statement changes the definition of a view, which must exist. The
syntax is similar to that for CREATE VIEW and the effect is the same as
for CREATE OR REPLACE VIEW. See [HELP CREATE VIEW]. This statement
requires the CREATE VIEW and DROP privileges for the view, and some
privilege for each column referred to in the SELECT statement. As of
MySQL 5.0.52, ALTER VIEW is allowed only to the original definer or
users with the SUPER privilege.

URL: http://dev.mysql.com/doc/refman/5.0/en/alter-view.html

6http://dev.mysql.com/doc/refman/5.0/en/alter-view.html2•   SHOW DATABASES ,Syntax:
SHOW {DATABASES | SCHEMAS}
    [LIKE 'pattern' | WHERE expr]

SHOW DATABASES lists the databases on the MySQL server host. SHOW
SCHEMAS is a synonym for SHOW DATABASES as of MySQL 5.0.2. The LIKE
clause, if present, indicates which database names to match. The WHERE
clause can be given to select rows using more general conditions, as
discussed in http://dev.mysql.com/doc/refman/5.0/en/extended-show.html.

You see only those databases for which you have some kind of privilege,
unless you have the global SHOW DATABASES privilege. You can also get
this list using the mysqlshow command.

If the server was started with the --skip-show-database option, you
cannot use this statement at all unless you have the SHOW DATABASES
privilege.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-databases.html

:http://dev.mysql.com/doc/refman/5.0/en/show-databases.html  Ç"–   ~ ] Syntax:
~

Invert all bits.

URL: http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html

# mysql> SELECT 5 & ~1;
        -> 4
9http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html }2—   TEXT .TEXT[(M)] [CHARACTER SET charset_name] [COLLATE collation_name]

A TEXT column with a maximum length of 65,535 (216 - 1) characters. The
effective maximum length is less if the value contains multi-byte
characters. Each TEXT value is stored using a two-byte length prefix
that indicates the number of bytes in the value.

An optional length M can be given for this type. If this is done, MySQL
creates the column as the smallest TEXT type large enough to hold
values M characters long.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.htmlŮ"   	CONCAT_WS" ¶Syntax:
CONCAT_WS(separator,str1,str2,...)

CONCAT_WS() stands for Concatenate With Separator and is a special form
of CONCAT(). The first argument is the separator for the rest of the
arguments. The separator is added between the strings to be
concatenated. The separator can be a string, as can the rest of the
arguments. If the separator is NULL, the result is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

Ń mysql> SELECT CONCAT_WS(',','First name','Second name','Last Name');
        -> 'First name,Second name,Last Name'
mysql> SELECT CONCAT_WS(',','First name',NULL,'Last Name');
        -> 'First name,Last Name'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html\ "™   	ROW_COUNT =Syntax:
ROW_COUNT()

ROW_COUNT() returns the number of rows updated, inserted, or deleted by
the preceding statement. This is the same as the row count that the
mysql client displays and the value from the mysql_affected_rows() C
API function.

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

Čmysql> INSERT INTO t VALUES(1),(2),(3);
Query OK, 3 rows affected (0.00 sec)
Records: 3  Duplicates: 0  Warnings: 0

mysql> SELECT ROW_COUNT();
+-------------+
| ROW_COUNT() |
+-------------+
|           3 |
+-------------+
1 row in set (0.00 sec)

mysql> DELETE FROM t WHERE i IN(1,2);
Query OK, 2 rows affected (0.00 sec)

mysql> SELECT ROW_COUNT();
+-------------+
| ROW_COUNT() |
+-------------+
|           2 |
+-------------+
1 row in set (0.00 sec)
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html( "š   ASIN É Syntax:
ASIN(X)

Returns the arc sine of X, that is, the value whose sine is X. Returns
NULL if X is not in the range -1 to 1.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

mysql> SELECT ASIN(0.2);
        -> 0.20135792079033
mysql> SELECT ASIN('foo');

+-------------+
| ASIN('foo') |
+-------------+
|           0 |
+-------------+
1 row in set, 1 warning (0.00 sec)

mysql> SHOW WARNINGS;
+---------+------+-----------------------------------------+
| Level   | Code | Message                                 |
+---------+------+-----------------------------------------+
| Warning | 1292 | Truncated incorrect DOUBLE value: 'foo' |
+---------+------+-----------------------------------------+
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html ü 2›   	SHOW LOGS ł Syntax:
SHOW [BDB] LOGS

In MySQL 5.0, this is a deprecated synonym for SHOW ENGINE BDB LOGS.
See [HELP SHOW ENGINE].

URL: http://dev.mysql.com/doc/refman/5.0/en/show-logs.html

5http://dev.mysql.com/doc/refman/5.0/en/show-logs.html‡"ś   SIGN Ă Syntax:
SIGN(X)

Returns the sign of the argument as -1, 0, or 1, depending on whether X
is negative, zero, or positive.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

q mysql> SELECT SIGN(-32);
        -> -1
mysql> SELECT SIGN(0);
        -> 0
mysql> SELECT SIGN(234);
        -> 1
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html "ť   SEC_TO_TIME TSyntax:
SEC_TO_TIME(seconds)

Returns the seconds argument, converted to hours, minutes, and seconds,
as a TIME value. The range of the result is constrained to that of the
TIME data type. A warning occurs if the argument corresponds to a value
outside that range.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

l mysql> SELECT SEC_TO_TIME(2378);
        -> '00:39:38'
mysql> SELECT SEC_TO_TIME(2378) + 0;
        -> 3938
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html á2ž   FLOAT FLOAT[(M,D)] [UNSIGNED] [ZEROFILL]

A small (single-precision) floating-point number. Allowable values are
-3.402823466E+38 to -1.175494351E-38, 0, and 1.175494351E-38 to
3.402823466E+38. These are the theoretical limits, based on the IEEE
standard. The actual range might be slightly smaller depending on your
hardware or operating system.

M is the total number of digits and D is the number of digits following
the decimal point. If M and D are omitted, values are stored to the
limits allowed by the hardware. A single-precision floating-point
number is accurate to approximately 7 decimal places.

UNSIGNED, if specified, disallows negative values.

Using FLOAT might give you some unexpected problems because all
calculations in MySQL are done with double precision. See
http://dev.mysql.com/doc/refman/5.0/en/no-matching-rows.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.htmlm"ź   LOCATE" xSyntax:
LOCATE(substr,str), LOCATE(substr,str,pos)

The first syntax returns the position of the first occurrence of
substring substr in string str. The second syntax returns the position
of the first occurrence of substring substr in string str, starting at
position pos. Returns 0 if substr is not in str.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

¦ mysql> SELECT LOCATE('bar', 'foobarbar');
        -> 4
mysql> SELECT LOCATE('xbar', 'foobar');
        -> 0
mysql> SELECT LOCATE('bar', 'foobarbar', 5);
        -> 7
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.htmlŤ"    CHARSET ‘ Syntax:
CHARSET(str)

Returns the character set of the string argument.

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

§ mysql> SELECT CHARSET('abc');
        -> 'latin1'
mysql> SELECT CHARSET(CONVERT('abc' USING utf8));
        -> 'utf8'
mysql> SELECT CHARSET(USER());
        -> 'utf8'
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html62ˇ   SUBDATE áSyntax:
SUBDATE(date,INTERVAL expr unit), SUBDATE(expr,days)

When invoked with the INTERVAL form of the second argument, SUBDATE()
is a synonym for DATE_SUB(). For information on the INTERVAL unit
argument, see the discussion for DATE_ADD().

mysql> SELECT DATE_SUB('2008-01-02', INTERVAL 31 DAY);
        -> '2007-12-02'
mysql> SELECT SUBDATE('2008-01-02', INTERVAL 31 DAY);
        -> '2007-12-02'

The second form allows the use of an integer value for days. In such
cases, it is interpreted as the number of days to be subtracted from
the date or datetime expression expr.

mysql> SELECT SUBDATE('2008-01-02 12:00:00', 31);
        -> '2007-12-02 12:00:00'

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  /"˘   	DAYOFYEAR ˇ Syntax:
DAYOFYEAR(date)

Returns the day of the year for date, in the range 1 to 366.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

5 mysql> SELECT DAYOFYEAR('2007-02-03');
        -> 34
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html †2Ł   LONGTEXT 3LONGTEXT [CHARACTER SET charset_name] [COLLATE collation_name]

A TEXT column with a maximum length of 4,294,967,295 or 4GB (232 - 1)
characters. The effective maximum length is less if the value contains
multi-byte characters. The effective maximum length of LONGTEXT columns
also depends on the configured maximum packet size in the client/server
protocol and available memory. Each LONGTEXT value is stored using a
four-byte length prefix that indicates the number of bytes in the
value.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html  f2¤   % Syntax:
N % M

Modulo operation. Returns the remainder of N divided by M. For more
information, see the description for the MOD() function in
http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html

@http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html  ž2Ą   KILL _Syntax:
KILL [CONNECTION | QUERY] thread_id

Each connection to mysqld runs in a separate thread. You can see which
threads are running with the SHOW PROCESSLIST statement and kill a
thread with the KILL thread_id statement.

In MySQL 5.0.0, KILL allows the optional CONNECTION or QUERY modifier:

o KILL CONNECTION is the same as KILL with no modifier: It terminates
  the connection associated with the given thread_id.

o KILL QUERY terminates the statement that the connection is currently
  executing, but leaves the connection itself intact.

If you have the PROCESS privilege, you can see all threads. If you have
the SUPER privilege, you can kill all threads and statements.
Otherwise, you can see and kill only your own threads and statements.

You can also use the mysqladmin processlist and mysqladmin kill
commands to examine and kill threads.

*Note*: You cannot use KILL with the Embedded MySQL Server library,
because the embedded server merely runs inside the threads of the host
application. It does not create any connection threads of its own.

URL: http://dev.mysql.com/doc/refman/5.0/en/kill.html

0http://dev.mysql.com/doc/refman/5.0/en/kill.html  V2¦   DISJOINT Ű Disjoint(g1,g2)

Returns 1 or 0 to indicate whether g1 is spatially disjoint from (does
not intersect) g2.

URL: http://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html

hhttp://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html  0 "§   ASTEXT Ţ AsText(g), AsWKT(g)

Converts a value in internal geometry format to its WKT representation
and returns the string result.

URL: http://dev.mysql.com/doc/refman/5.0/en/functions-to-convert-geometries-between-formats.html

ä mysql> SET @g = 'LineString(1 1,2 2,3 3)';
mysql> SELECT AsText(GeomFromText(@g));
+--------------------------+
| AsText(GeomFromText(@g)) |
+--------------------------+
| LINESTRING(1 1,2 2,3 3)  |
+--------------------------+
[http://dev.mysql.com/doc/refman/5.0/en/functions-to-convert-geometries-between-formats.htmlą"¨   LPAD" 	Syntax:
LPAD(str,len,padstr)

Returns the string str, left-padded with the string padstr to a length
of len characters. If str is longer than len, the return value is
shortened to len characters.


URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

c mysql> SELECT LPAD('hi',4,'??');
        -> '??hi'
mysql> SELECT LPAD('hi',1,'??');
        -> 'h'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html–2©   RESTORE TABLE ESyntax:
RESTORE TABLE tbl_name [, tbl_name] ... FROM '/path/to/backup/directory'

RESTORE TABLE restores the table or tables from a backup that was made
with BACKUP TABLE. The directory should be specified as a full path
name.

Existing tables are not overwritten; if you try to restore over an
existing table, an error occurs. Just as for BACKUP TABLE, RESTORE
TABLE currently works only for MyISAM tables. Restored tables are not
replicated from master to slave.

The backup for each table consists of its .frm format file and .MYD
data file. The restore operation restores those files, and then uses
them to rebuild the .MYI index file. Restoring takes longer than
backing up due to the need to rebuild the indexes. The more indexes the
table has, the longer it takes.

URL: http://dev.mysql.com/doc/refman/5.0/en/restore-table.html

9http://dev.mysql.com/doc/refman/5.0/en/restore-table.html  ·2Ş   DECLARE CONDITION ^Syntax:
DECLARE condition_name CONDITION FOR condition_value

condition_value:
    SQLSTATE [VALUE] sqlstate_value
  | mysql_error_code

The DECLARE ... CONDITION statement defines a named error condition. It
specifies a condition that needs specific handling and associates a
name with that condition. The name can be referred to in a subsequence
DECLARE ... HANDLER statement. See [HELP DECLARE HANDLER].

A condition_value for DECLARE ... CONDITION can be an SQLSTATE value (a
5-character string literal) or a MySQL error code (a number). You
should not use SQLSTATE value '00000' or MySQL error code 0, because
those indicate sucess rather than an error condition. For a list of
SQLSTATE values and MySQL error codes, see
http://dev.mysql.com/doc/refman/5.0/en/error-messages-server.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/declare-condition.html

=http://dev.mysql.com/doc/refman/5.0/en/declare-condition.html í2«   OVERLAPS rOverlaps(g1,g2)

Returns 1 or 0 to indicate whether g1 spatially overlaps g2. The term
spatially overlaps is used if two geometries intersect and their
intersection results in a geometry of the same dimension but not equal
to either of the given geometries.

URL: http://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html

hhttp://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.htmlć2¬   !SET GLOBAL SQL_SLAVE_SKIP_COUNTER mSyntax:
SET GLOBAL SQL_SLAVE_SKIP_COUNTER = N

This statement skips the next N events from the master. This is useful
for recovering from replication stops caused by a statement.

This statement is valid only when the slave thread is not running.
Otherwise, it produces an error.

URL: http://dev.mysql.com/doc/refman/5.0/en/set-global-sql-slave-skip-counter.html

Mhttp://dev.mysql.com/doc/refman/5.0/en/set-global-sql-slave-skip-counter.html  …"­   NUMGEOMETRIES Í NumGeometries(gc)

Returns the number of geometries in the GeometryCollection value gc.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#geometrycollection-property-functions

1mysql> SET @gc = 'GeometryCollection(Point(1 1),LineString(2 2, 3 3))';
mysql> SELECT NumGeometries(GeomFromText(@gc));
+----------------------------------+
| NumGeometries(GeomFromText(@gc)) |
+----------------------------------+
|                                2 |
+----------------------------------+
mhttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#geometrycollection-property-functionsŘ "®   	MONTHNAME BSyntax:
MONTHNAME(date)

Returns the full name of the month for date. As of MySQL 5.0.25, the
language used for the name is controlled by the value of the
lc_time_names system variable
(http://dev.mysql.com/doc/refman/5.0/en/locale-support.html).

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

= mysql> SELECT MONTHNAME('2008-02-03');
        -> 'February'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlß2Ż   PROCEDURE ANALYSE# †Syntax:
ANALYSE([max_elements[,max_memory]])

ANALYSE() is defined in the sql/sql_analyse.cc source file, which
serves as an example of how to create a procedure for use with the
PROCEDURE clause of SELECT statements. ANALYSE() is built in and is
available by default; other procedures can be created using the format
demonstrated in the source file.

ANALYSE() examines the result from a query and returns an analysis of
the results that suggests optimal data types for each column that may
help reduce table sizes. To obtain this analysis, append PROCEDURE
ANALYSE to the end of a SELECT statement:

SELECT ... FROM ... WHERE ... PROCEDURE ANALYSE([max_elements,[max_memory]])

For example:

SELECT col1, col2 FROM table1 PROCEDURE ANALYSE(10, 2000);

The results show some statistics for the values returned by the query,
and propose an optimal data type for the columns. This can be helpful
for checking your existing tables, or after importing new data. You may
need to try different settings for the arguments so that PROCEDURE
ANALYSE() does not suggest the ENUM data type when it is not
appropriate.

The arguments are optional and are used as follows:

o max_elements (default 256) is the maximum number of distinct values
  that ANALYSE() notices per column. This is used by ANALYSE() to check
  whether the optimal data type should be of type ENUM; if there are
  more than max_elements distinct values, then ENUM is not a suggested
  type.

o max_memory (default 8192) is the maximum amount of memory that
  ANALYSE() should allocate per column while trying to find all
  distinct values.

URL: http://dev.mysql.com/doc/refman/5.0/en/procedure-analyse.html

=http://dev.mysql.com/doc/refman/5.0/en/procedure-analyse.html ś 2°   CHANGE MASTER TO ESyntax:
CHANGE MASTER TO master_def [, master_def] ...

master_def:
    MASTER_HOST = 'host_name'
  | MASTER_USER = 'user_name'
  | MASTER_PASSWORD = 'password'
  | MASTER_PORT = port_num
  | MASTER_CONNECT_RETRY = interval
  | MASTER_LOG_FILE = 'master_log_name'
  | MASTER_LOG_POS = master_log_pos
  | RELAY_LOG_FILE = 'relay_log_name'
  | RELAY_LOG_POS = relay_log_pos
  | MASTER_SSL = {0|1}
  | MASTER_SSL_CA = 'ca_file_name'
  | MASTER_SSL_CAPATH = 'ca_directory_name'
  | MASTER_SSL_CERT = 'cert_file_name'
  | MASTER_SSL_KEY = 'key_file_name'
  | MASTER_SSL_CIPHER = 'cipher_list'

CHANGE MASTER TO changes the parameters that the slave server uses for
connecting to and communicating with the master server. It also updates
the contents of the master.info and relay-log.info files.

MASTER_USER, MASTER_PASSWORD, MASTER_SSL, MASTER_SSL_CA,
MASTER_SSL_CAPATH, MASTER_SSL_CERT, MASTER_SSL_KEY, and
MASTER_SSL_CIPHER provide information to the slave about how to connect
to its master.

MASTER_CONNECT_RETRY specifies how many seconds to wait between connect
retries. The default is 60. The number of reconnection attempts is
limited by the --master-retry-count server option; for more
information, see
http://dev.mysql.com/doc/refman/5.0/en/replication-options.html.

The SSL options (MASTER_SSL, MASTER_SSL_CA, MASTER_SSL_CAPATH,
MASTER_SSL_CERT, MASTER_SSL_KEY, and MASTER_SSL_CIPHER) can be changed
even on slaves that are compiled without SSL support. They are saved to
the master.info file, but are ignored unless you use a server that has
SSL support enabled.

If you don't specify a given parameter, it keeps its old value, except
as indicated in the following discussion. For example, if the password
to connect to your MySQL master has changed, you just need to issue
these statements to tell the slave about the new password:

STOP SLAVE; -- if replication was running
CHANGE MASTER TO MASTER_PASSWORD='new3cret';
START SLAVE; -- if you want to restart replication

There is no need to specify the parameters that do not change (host,
port, user, and so forth).

MASTER_HOST and MASTER_PORT are the host name (or IP address) of the
master host and its TCP/IP port.

*Note*: Replication cannot use Unix socket files. You must be able to
connect to the master MySQL server using TCP/IP.

If you specify MASTER_HOST or MASTER_PORT, the slave assumes that the
master server is different from before (even if you specify a host or
port value that is the same as the current value.) In this case, the
old values for the master binary log name and position are considered
no longer applicable, so if you do not specify MASTER_LOG_FILE and
MASTER_LOG_POS in the statement, MASTER_LOG_FILE='' and
MASTER_LOG_POS=4 are silently appended to it.

Setting MASTER_HOST='' --- that is, setting its value explicitly to an
empty string --- is not the same as not setting it at all. Setting this
option to an empty string causes START SLAVE subsequently to fail.
(Bug#28796 (http://bugs.mysql.com/28796))

MASTER_LOG_FILE and MASTER_LOG_POS are the coordinates at which the
slave I/O thread should begin reading from the master the next time the
thread starts. If you specify either of them, you cannot specify
RELAY_LOG_FILE or RELAY_LOG_POS. If neither of MASTER_LOG_FILE or
MASTER_LOG_POS are specified, the slave uses the last coordinates of
the slave SQL thread before CHANGE MASTER TO was issued. This ensures
that there is no discontinuity in replication, even if the slave SQL
thread was late compared to the slave I/O thread, when you merely want
to change, say, the password to use.

CHANGE MASTER TO deletes all relay log files and starts a new one,
unless you specify RELAY_LOG_FILE or RELAY_LOG_POS. In that case, relay
logs are kept; the relay_log_purge global variable is set silently to
0.

CHANGE MASTER TO is useful for setting up a slave when you have the
snapshot of the master and have recorded the log and the offset
corresponding to it. After loading the snapshot into the slave, you can
run CHANGE MASTER TO MASTER_LOG_FILE='log_name_on_master',
MASTER_LOG_POS=log_offset_on_master on the slave.

The following example changes the master and master's binary log
coordinates. This is used when you want to set up the slave to
replicate the master:

CHANGE MASTER TO
  MASTER_HOST='master2.mycompany.com',
  MASTER_USER='replication',
  MASTER_PASSWORD='bigs3cret',
  MASTER_PORT=3306,
  MASTER_LOG_FILE='master2-bin.001',
  MASTER_LOG_POS=4,
  MASTER_CONNECT_RETRY=10;

The next example shows an operation that is less frequently employed.
It is used when the slave has relay logs that you want it to execute
again for some reason. To do this, the master need not be reachable.
You need only use CHANGE MASTER TO and start the SQL thread (START
SLAVE SQL_THREAD):

CHANGE MASTER TO
  RELAY_LOG_FILE='slave-relay-bin.006',
  RELAY_LOG_POS=4025;

URL: http://dev.mysql.com/doc/refman/5.0/en/change-master-to.html

<http://dev.mysql.com/doc/refman/5.0/en/change-master-to.html 2±   DROP DATABASE$ 7Syntax:
DROP {DATABASE | SCHEMA} [IF EXISTS] db_name

DROP DATABASE drops all tables in the database and deletes the
database. Be very careful with this statement! To use DROP DATABASE,
you need the DROP privilege on the database. DROP SCHEMA is a synonym
for DROP DATABASE as of MySQL 5.0.2.

*Important*: When a database is dropped, user privileges on the
database are not automatically dropped. See [HELP GRANT].

IF EXISTS is used to prevent an error from occurring if the database
does not exist.

URL: http://dev.mysql.com/doc/refman/5.0/en/drop-database.html

9http://dev.mysql.com/doc/refman/5.0/en/drop-database.html'2˛   MBREQUAL Ď MBREqual(g1,g2)

Returns 1 or 0 to indicate whether the Minimum Bounding Rectangles of
the two geometries g1 and g2 are the same.

URL: http://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.html

Ehttp://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.html u"ł   TIMESTAMP FUNCTION oSyntax:
TIMESTAMP(expr), TIMESTAMP(expr1,expr2)

With a single argument, this function returns the date or datetime
expression expr as a datetime value. With two arguments, it adds the
time expression expr2 to the date or datetime expression expr1 and
returns the result as a datetime value.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

¤ mysql> SELECT TIMESTAMP('2003-12-31');
        -> '2003-12-31 00:00:00'
mysql> SELECT TIMESTAMP('2003-12-31 12:00:00','12:00:00');
        -> '2004-01-01 00:00:00'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html í2´   CHARACTER_LENGTH" – Syntax:
CHARACTER_LENGTH(str)

CHARACTER_LENGTH() is a synonym for CHAR_LENGTH().

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.htmlÁ2µ   SHOW GRANTS tSyntax:
SHOW GRANTS [FOR user]

This statement lists the GRANT statement or statements that must be
issued to duplicate the privileges that are granted to a MySQL user
account. The account is named using the same format as for the GRANT
statement; for example, 'jeffrey'@'localhost'. If you specify only the
user name part of the account name, a host name part of '%' is used.
For additional information about specifying account names, see [HELP
GRANT].

mysql> SHOW GRANTS FOR 'root'@'localhost';
+---------------------------------------------------------------------+
| Grants for root@localhost                                           |
+---------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION |
+---------------------------------------------------------------------+

To list the privileges granted to the account that you are using to
connect to the server, you can use any of the following statements:

SHOW GRANTS;
SHOW GRANTS FOR CURRENT_USER;
SHOW GRANTS FOR CURRENT_USER();

As of MySQL 5.0.24, if SHOW GRANTS FOR CURRENT_USER (or any of the
equivalent syntaxes) is used in DEFINER context, such as within a
stored procedure that is defined with SQL SECURITY DEFINER), the grants
displayed are those of the definer and not the invoker.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-grants.html

7http://dev.mysql.com/doc/refman/5.0/en/show-grants.htmlI2¶   SHOW PRIVILEGES ô Syntax:
SHOW PRIVILEGES

SHOW PRIVILEGES shows the list of system privileges that the MySQL
server supports. The exact list of privileges depends on the version of
your server.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-privileges.html

;http://dev.mysql.com/doc/refman/5.0/en/show-privileges.htmlň"·   INSERT FUNCTION" ÂSyntax:
INSERT(str,pos,len,newstr)

Returns the string str, with the substring beginning at position pos
and len characters long replaced by the string newstr. Returns the
original string if pos is not within the length of the string. Replaces
the rest of the string from position pos if len is not within the
length of the rest of the string. Returns NULL if any argument is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

Ř mysql> SELECT INSERT('Quadratic', 3, 4, 'What');
        -> 'QuWhattic'
mysql> SELECT INSERT('Quadratic', -1, 4, 'What');
        -> 'Quadratic'
mysql> SELECT INSERT('Quadratic', 3, 100, 'What');
        -> 'QuWhat'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  ď"¸   CRC32 3Syntax:
CRC32(expr)

Computes a cyclic redundancy check value and returns a 32-bit unsigned
value. The result is NULL if the argument is NULL. The argument is
expected to be a string and (if possible) is treated as one if it is
not.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

h mysql> SELECT CRC32('MySQL');
        -> 3259397556
mysql> SELECT CRC32('mysql');
        -> 2501908538
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html Ř "ą   XOR ď Syntax:
XOR

Logical XOR. Returns NULL if either operand is NULL. For non-NULL
operands, evaluates to 1 if an odd number of operands is nonzero,
otherwise 0 is returned.

URL: http://dev.mysql.com/doc/refman/5.0/en/logical-operators.html

ś mysql> SELECT 1 XOR 1;
        -> 0
mysql> SELECT 1 XOR 0;
        -> 1
mysql> SELECT 1 XOR NULL;
        -> NULL
mysql> SELECT 1 XOR 1 XOR 1;
        -> 1
=http://dev.mysql.com/doc/refman/5.0/en/logical-operators.htmlr"ş   
STARTPOINT Ă StartPoint(ls)

Returns the Point that is the start point of the LineString value ls.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#linestring-property-functions

3mysql> SET @ls = 'LineString(1 1,2 2,3 3)';
mysql> SELECT AsText(StartPoint(GeomFromText(@ls)));
+---------------------------------------+
| AsText(StartPoint(GeomFromText(@ls))) |
+---------------------------------------+
| POINT(1 1)                            |
+---------------------------------------+
ehttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#linestring-property-functions  ™2»   DECLARE VARIABLE <Syntax:
DECLARE var_name [, var_name] ... type [DEFAULT value]

This statement is used to declare local variables within stored
programs. To provide a default value for the variable, include a
DEFAULT clause. The value can be specified as an expression; it need
not be a constant. If the DEFAULT clause is missing, the initial value
is NULL.

Local variables are treated like stored routine parameters with respect
to data type and overflow checking. See [HELP CREATE PROCEDURE].

Local variable names are not case sensitive.

The scope of a local variable is within the BEGIN ... END block where
it is declared. The variable can be referred to in blocks nested within
the declaring block, except those blocks that declare a variable with
the same name.

URL: http://dev.mysql.com/doc/refman/5.0/en/declare-local-variable.html

Bhttp://dev.mysql.com/doc/refman/5.0/en/declare-local-variable.htmló2Ľ   GRANT ˛Syntax:
GRANT
    priv_type [(column_list)]
      [, priv_type [(column_list)]] ...
    ON [object_type] priv_level
    TO user [IDENTIFIED BY [PASSWORD] 'password']
        [, user [IDENTIFIED BY [PASSWORD] 'password']] ...
    [REQUIRE {NONE | ssl_option [[AND] ssl_option] ...}]
    [WITH with_option [with_option] ...]

object_type:
    TABLE
  | FUNCTION
  | PROCEDURE

priv_level:
    *
  | *.*
  | db_name.*
  | db_name.tbl_name
  | tbl_name
  | db_name.routine_name

with_option:
    GRANT OPTION
  | MAX_QUERIES_PER_HOUR count
  | MAX_UPDATES_PER_HOUR count
  | MAX_CONNECTIONS_PER_HOUR count
  | MAX_USER_CONNECTIONS count

ssl_option:
    SSL
  | X509
  | CIPHER 'cipher'
  | ISSUER 'issuer'
  | SUBJECT 'subject'

The GRANT statement enables system administrators to create MySQL user
accounts and to grant rights to accounts. To use GRANT, you must have
the GRANT OPTION privilege, and you must have the privileges that you
are granting. The REVOKE statement is related and enables
administrators to remove account privileges. To determine what
privileges an account has, use SHOW GRANTS. See [HELP REVOKE], and
[HELP SHOW GRANTS].

URL: http://dev.mysql.com/doc/refman/5.0/en/grant.html

1http://dev.mysql.com/doc/refman/5.0/en/grant.html N2˝   MPOLYFROMTEXT á MPolyFromText(wkt[,srid]), MultiPolygonFromText(wkt[,srid])

Constructs a MULTIPOLYGON value using its WKT representation and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions  .2ľ   MBRINTERSECTS Ń MBRIntersects(g1,g2)

Returns 1 or 0 to indicate whether the Minimum Bounding Rectangles of
the two geometries g1 and g2 intersect.

URL: http://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.html

Ehttp://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.html   2ż   BIT_OR Ĺ Syntax:
BIT_OR(expr)

Returns the bitwise OR of all bits in expr. The calculation is
performed with 64-bit (BIGINT) precision.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.htmlä "Ŕ   YEARWEEK TSyntax:
YEARWEEK(date), YEARWEEK(date,mode)

Returns year and week for a date. The mode argument works exactly like
the mode argument to WEEK(). The year in the result may be different
from the year in the date argument for the first and the last week of
the year.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

8 mysql> SELECT YEARWEEK('1987-01-01');
        -> 198653
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html ř 2Á   NOT BETWEEN ˘ Syntax:
expr NOT BETWEEN min AND max

This is the same as NOT (expr BETWEEN min AND max).

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.htmln"Â   IS NOT Á Syntax:
IS NOT boolean_value

Tests a value against a boolean value, where boolean_value can be TRUE,
FALSE, or UNKNOWN.

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

Z mysql> SELECT 1 IS NOT UNKNOWN, 0 IS NOT UNKNOWN, NULL IS NOT UNKNOWN;
        -> 1, 1, 0
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html  Z"Ă   LOG10 € Syntax:
LOG10(X)

Returns the base-10 logarithm of X.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

† mysql> SELECT LOG10(2);
        -> 0.30102999566398
mysql> SELECT LOG10(100);
        -> 2
mysql> SELECT LOG10(-100);
        -> NULL
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html  a"Ä   SQRT Ž Syntax:
SQRT(X)

Returns the square root of a nonnegative number X.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

€ mysql> SELECT SQRT(4);
        -> 2
mysql> SELECT SQRT(20);
        -> 4.4721359549996
mysql> SELECT SQRT(-16);
        -> NULL
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html72Ĺ   DECIMAL äDECIMAL[(M[,D])] [UNSIGNED] [ZEROFILL]

For MySQL 5.0.3 and above:

A packed "exact" fixed-point number. M is the total number of digits
(the precision) and D is the number of digits after the decimal point
(the scale). The decimal point and (for negative numbers) the "-" sign
are not counted in M. If D is 0, values have no decimal point or
fractional part. The maximum number of digits (M) for DECIMAL is 65 (64
from 5.0.3 to 5.0.5). The maximum number of supported decimals (D) is
30. If D is omitted, the default is 0. If M is omitted, the default is
10.

UNSIGNED, if specified, disallows negative values.

All basic calculations (+, -, *, /) with DECIMAL columns are done with
a precision of 65 digits.

Before MySQL 5.0.3:

An unpacked fixed-point number. Behaves like a CHAR column; "unpacked"
means the number is stored as a string, using one character for each
digit of the value. M is the total number of digits and D is the number
of digits after the decimal point. The decimal point and (for negative
numbers) the "-" sign are not counted in M, although space for them is
reserved. If D is 0, values have no decimal point or fractional part.
The maximum range of DECIMAL values is the same as for DOUBLE, but the
actual range for a given DECIMAL column may be constrained by the
choice of M and D. If D is omitted, the default is 0. If M is omitted,
the default is 10.

UNSIGNED, if specified, disallows negative values.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html „ 2Ć   CREATE INDEX$ 5Syntax:
CREATE [UNIQUE|FULLTEXT|SPATIAL] INDEX index_name
    [index_type]
    ON tbl_name (index_col_name,...)
    [index_type]

index_col_name:
    col_name [(length)] [ASC | DESC]

index_type:
    USING {BTREE | HASH | RTREE}

CREATE INDEX is mapped to an ALTER TABLE statement to create indexes.
See [HELP ALTER TABLE]. CREATE INDEX cannot be used to create a PRIMARY
KEY; use ALTER TABLE instead. For more information about indexes, see
http://dev.mysql.com/doc/refman/5.0/en/mysql-indexes.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/create-index.html

8http://dev.mysql.com/doc/refman/5.0/en/create-index.html«2Ç   CREATE FUNCTION$ VThe CREATE FUNCTION statement is used to create stored functions and
user-defined functions (UDFs):

o For information about creating stored functions, see [HELP CREATE
  PROCEDURE].

o For information about creating user-defined functions, see [HELP
  CREATE FUNCTION UDF].

URL: http://dev.mysql.com/doc/refman/5.0/en/create-function.html

;http://dev.mysql.com/doc/refman/5.0/en/create-function.html Š2Č   ALTER DATABASE$ 7Syntax:
ALTER {DATABASE | SCHEMA} [db_name]
    alter_specification ...

alter_specification:
    [DEFAULT] CHARACTER SET [=] charset_name
  | [DEFAULT] COLLATE [=] collation_name

ALTER DATABASE enables you to change the overall characteristics of a
database. These characteristics are stored in the db.opt file in the
database directory. To use ALTER DATABASE, you need the ALTER privilege
on the database. ALTER SCHEMA is a synonym for ALTER DATABASE as of
MySQL 5.0.2.

The CHARACTER SET clause changes the default database character set.
The COLLATE clause changes the default database collation.
http://dev.mysql.com/doc/refman/5.0/en/charset.html, discusses
character set and collation names.

You can see what character sets and collations are available using,
respectively, the SHOW CHARACTER SET and SHOW COLLATION statements. See
[HELP SHOW CHARACTER SET], and [HELP SHOW COLLATION], for more
information.

The database name can be omitted, in which case the statement applies
to the default database.

URL: http://dev.mysql.com/doc/refman/5.0/en/alter-database.html

:http://dev.mysql.com/doc/refman/5.0/en/alter-database.html  Ć"É   	GEOMETRYN î GeometryN(gc,N)

Returns the N-th geometry in the GeometryCollection value gc.
Geometries are numbered beginning with 1.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#geometrycollection-property-functions

Umysql> SET @gc = 'GeometryCollection(Point(1 1),LineString(2 2, 3 3))';
mysql> SELECT AsText(GeometryN(GeomFromText(@gc),1));
+----------------------------------------+
| AsText(GeometryN(GeomFromText(@gc),1)) |
+----------------------------------------+
| POINT(1 1)                             |
+----------------------------------------+
mhttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#geometrycollection-property-functions   ç"Ę   << | Syntax:
<<

Shifts a longlong (BIGINT) number to the left.

URL: http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html

# mysql> SELECT 1 << 2;
        -> 4
9http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html 2Ë   SHOW TABLE STATUS (Syntax:
SHOW TABLE STATUS [{FROM | IN} db_name]
    [LIKE 'pattern' | WHERE expr]

SHOW TABLE STATUS works likes SHOW TABLES, but provides a lot of
information about each non-TEMPORARY table. You can also get this list
using the mysqlshow --status db_name command. The LIKE clause, if
present, indicates which table names to match. The WHERE clause can be
given to select rows using more general conditions, as discussed in
http://dev.mysql.com/doc/refman/5.0/en/extended-show.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-table-status.html

=http://dev.mysql.com/doc/refman/5.0/en/show-table-status.htmlŔ "Ě   MD5
 $Syntax:
MD5(str)

Calculates an MD5 128-bit checksum for the string. The value is
returned as a binary string of 32 hex digits, or NULL if the argument
was NULL. The return value can, for example, be used as a hash key.

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

L mysql> SELECT MD5('testing');
        -> 'ae2b1fca515949e5d54fb22b8ed95575'
@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html Î"Í   < ^ Syntax:
<

Less than:

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

" mysql> SELECT 2 < 2;
        -> 0
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html  š"Î   UNIX_TIMESTAMP »Syntax:
UNIX_TIMESTAMP(), UNIX_TIMESTAMP(date)

If called with no argument, returns a Unix timestamp (seconds since
'1970-01-01 00:00:00' UTC) as an unsigned integer. If UNIX_TIMESTAMP()
is called with a date argument, it returns the value of the argument as
seconds since '1970-01-01 00:00:00' UTC. date may be a DATE string, a
DATETIME string, a TIMESTAMP, or a number in the format YYMMDD or
YYYYMMDD. The server interprets date as a value in the current time
zone and converts it to an internal value in UTC. Clients can set their
time zone as described in
http://dev.mysql.com/doc/refman/5.0/en/time-zone-support.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

 mysql> SELECT UNIX_TIMESTAMP();
        -> 1196440210
mysql> SELECT UNIX_TIMESTAMP('2007-11-30 10:30:19');
        -> 1196440219
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  € "Ď   
DAYOFMONTH ń Syntax:
DAYOFMONTH(date)

Returns the day of the month for date, in the range 1 to 31, or 0 for
dates such as '0000-00-00' or '2008-00-00' that have a zero day part.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

5 mysql> SELECT DAYOFMONTH('2007-02-03');
        -> 3
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlĚ "Đ   ASCII" Syntax:
ASCII(str)

Returns the numeric value of the leftmost character of the string str.
Returns 0 if str is the empty string. Returns NULL if str is NULL.
ASCII() works for 8-bit characters.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

x mysql> SELECT ASCII('2');
        -> 50
mysql> SELECT ASCII(2);
        -> 50
mysql> SELECT ASCII('dx');
        -> 100
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html]"Ń   DIV é Syntax:
DIV

Integer division. Similar to FLOOR(), but is safe with BIGINT values.
Incorrect results may occur for noninteger operands that exceed BIGINT
range.

URL: http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html

$ mysql> SELECT 5 DIV 2;
        -> 2
@http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.htmlß2Ň   RENAME USER ’Syntax:
RENAME USER old_user TO new_user
    [, old_user TO new_user] ...

The RENAME USER statement renames existing MySQL accounts. To use it,
you must have the global CREATE USER privilege or the UPDATE privilege
for the mysql database. An error occurs if any old account does not
exist or any new account exists. Each account is named using the same
format as for the GRANT statement; for example, 'jeffrey'@'localhost'.
If you specify only the user name part of the account name, a host name
part of '%' is used. For additional information about specifying
account names, see [HELP GRANT].

URL: http://dev.mysql.com/doc/refman/5.0/en/rename-user.html

7http://dev.mysql.com/doc/refman/5.0/en/rename-user.html w2Ó   SHOW SLAVE STATUS Syntax:
SHOW SLAVE STATUS

This statement provides status information on essential parameters of
the slave threads. It requires either the SUPER or REPLICATION CLIENT
privilege.

If you issue this statement using the mysql client, you can use a \G
statement terminator rather than a semicolon to obtain a more readable
vertical layout:

mysql> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
       Slave_IO_State: Waiting for master to send event
          Master_Host: localhost
          Master_User: root
          Master_Port: 3306
        Connect_Retry: 3
      Master_Log_File: gbichot-bin.005
  Read_Master_Log_Pos: 79
       Relay_Log_File: gbichot-relay-bin.005
        Relay_Log_Pos: 548
Relay_Master_Log_File: gbichot-bin.005
     Slave_IO_Running: Yes
    Slave_SQL_Running: Yes
      Replicate_Do_DB:
  Replicate_Ignore_DB:
           Last_Errno: 0
           Last_Error:
         Skip_Counter: 0
  Exec_Master_Log_Pos: 79
      Relay_Log_Space: 552
      Until_Condition: None
       Until_Log_File:
        Until_Log_Pos: 0
   Master_SSL_Allowed: No
   Master_SSL_CA_File:
   Master_SSL_CA_Path:
      Master_SSL_Cert:
    Master_SSL_Cipher:
       Master_SSL_Key:
Seconds_Behind_Master: 8

URL: http://dev.mysql.com/doc/refman/5.0/en/show-slave-status.html

=http://dev.mysql.com/doc/refman/5.0/en/show-slave-status.html -"Ô   GEOMETRY ´MySQL provides a standard way of creating spatial columns for geometry
types, for example, with CREATE TABLE or ALTER TABLE. Currently,
spatial columns are supported for MyISAM, InnoDB, NDB, BDB, and ARCHIVE
tables. (Support for storage engines other than MyISAM was added in
MySQL 5.0.16.) See also the annotations about spatial indexes under
[HELP SPATIAL].

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-columns.html

  CREATE TABLE geom (g GEOMETRY);
Dhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-columns.html4 "Ő   	NUMPOINTS Ľ NumPoints(ls)

Returns the number of Point objects in the LineString value ls.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#linestring-property-functions

ý mysql> SET @ls = 'LineString(1 1,2 2,3 3)';
mysql> SELECT NumPoints(GeomFromText(@ls));
+------------------------------+
| NumPoints(GeomFromText(@ls)) |
+------------------------------+
|                            3 |
+------------------------------+
ehttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#linestring-property-functions Ĺ"Ö   & Y Syntax:
&

Bitwise AND:

URL: http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html

% mysql> SELECT 29 & 15;
        -> 13
9http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html2×   LOCALTIMESTAMP ± Syntax:
LOCALTIMESTAMP, LOCALTIMESTAMP()

LOCALTIMESTAMP and LOCALTIMESTAMP() are synonyms for NOW().

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlż"Ř   CONVERT" 2Syntax:
CONVERT(expr,type), CONVERT(expr USING transcoding_name)

The CONVERT() and CAST() functions take a value of one type and produce
a value of another type.

The type can be one of the following values:

o BINARY[(N)]

o CHAR[(N)]

o DATE

o DATETIME

o DECIMAL[(M[,D])]

o SIGNED [INTEGER]

o TIME

o UNSIGNED [INTEGER]

BINARY produces a string with the BINARY data type. See
http://dev.mysql.com/doc/refman/5.0/en/binary-varbinary.html for a
description of how this affects comparisons. If the optional length N
is given, BINARY(N) causes the cast to use no more than N bytes of the
argument. As of MySQL 5.0.17, values shorter than N bytes are padded
with 0x00 bytes to a length of N.

CHAR(N) causes the cast to use no more than N characters of the
argument.

The DECIMAL type is available as of MySQL 5.0.8.

CAST() and CONVERT(... USING ...) are standard SQL syntax. The
non-USING form of CONVERT() is ODBC syntax.

CONVERT() with USING is used to convert data between different
character sets. In MySQL, transcoding names are the same as the
corresponding character set names. For example, this statement converts
the string 'abc' in the default character set to the corresponding
string in the utf8 character set:

SELECT CONVERT('abc' USING utf8);

URL: http://dev.mysql.com/doc/refman/5.0/en/cast-functions.html

? SELECT enum_col FROM tbl_name ORDER BY CAST(enum_col AS CHAR);
:http://dev.mysql.com/doc/refman/5.0/en/cast-functions.html +"Ů   ADDDATE “Syntax:
ADDDATE(date,INTERVAL expr unit), ADDDATE(expr,days)

When invoked with the INTERVAL form of the second argument, ADDDATE()
is a synonym for DATE_ADD(). The related function SUBDATE() is a
synonym for DATE_SUB(). For information on the INTERVAL unit argument,
see the discussion for DATE_ADD().

mysql> SELECT DATE_ADD('2008-01-02', INTERVAL 31 DAY);
        -> '2008-02-02'
mysql> SELECT ADDDATE('2008-01-02', INTERVAL 31 DAY);
        -> '2008-02-02'

When invoked with the days form of the second argument, MySQL treats it
as an integer number of days to be added to expr.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

A mysql> SELECT ADDDATE('2008-01-02', 31);
        -> '2008-02-02'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html ô "Ú   REPEAT LOOP /Syntax:
[begin_label:] REPEAT
    statement_list
UNTIL search_condition
END REPEAT [end_label]

The statement list within a REPEAT statement is repeated until the
search_condition is true. Thus, a REPEAT always enters the loop at
least once. statement_list consists of one or more statements, each
terminated by a semicolon (;) statement delimiter.

A REPEAT statement can be labeled. end_label cannot be given unless
begin_label also is present. If both are present, they must be the
same.

URL: http://dev.mysql.com/doc/refman/5.0/en/repeat-statement.html

qmysql> delimiter //

mysql> CREATE PROCEDURE dorepeat(p1 INT)
    -> BEGIN
    ->   SET @x = 0;
    ->   REPEAT SET @x = @x + 1; UNTIL @x > p1 END REPEAT;
    -> END
    -> //
Query OK, 0 rows affected (0.00 sec)

mysql> CALL dorepeat(1000)//
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT @x//
+------+
| @x   |
+------+
| 1001 |
+------+
1 row in set (0.00 sec)
<http://dev.mysql.com/doc/refman/5.0/en/repeat-statement.html2Ű   ALTER FUNCTION$ ®Syntax:
ALTER FUNCTION func_name [characteristic ...]

characteristic:
    { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }
  | SQL SECURITY { DEFINER | INVOKER }
  | COMMENT 'string'

This statement can be used to change the characteristics of a stored
function. More than one change may be specified in an ALTER FUNCTION
statement. However, you cannot change the parameters or body of a
stored function using this statement; to make such changes, you must
drop and re-create the function using DROP FUNCTION and CREATE
FUNCTION.

As of MySQL 5.0.3, you must have the ALTER ROUTINE privilege for the
function. (That privilege is granted automatically to the function
creator.) If binary logging is enabled, the ALTER FUNCTION statement
might also require the SUPER privilege, as described in
http://dev.mysql.com/doc/refman/5.0/en/stored-programs-logging.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/alter-function.html

:http://dev.mysql.com/doc/refman/5.0/en/alter-function.html2Ü   SMALLINT Ć SMALLINT[(M)] [UNSIGNED] [ZEROFILL]

A small integer. The signed range is -32768 to 32767. The unsigned
range is 0 to 65535.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html  2Ý   DOUBLE PRECISION %DOUBLE PRECISION[(M,D)] [UNSIGNED] [ZEROFILL], REAL[(M,D)] [UNSIGNED]
[ZEROFILL]

These types are synonyms for DOUBLE. Exception: If the REAL_AS_FLOAT
SQL mode is enabled, REAL is a synonym for FLOAT rather than DOUBLE.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html< "Ţ   ORD" ĘSyntax:
ORD(str)

If the leftmost character of the string str is a multi-byte character,
returns the code for that character, calculated from the numeric values
of its constituent bytes using this formula:

  (1st byte code)
+ (2nd byte code x 256)
+ (3rd byte code x 2562) ...

If the leftmost character is not a multi-byte character, ORD() returns
the same value as the ASCII() function.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

& mysql> SELECT ORD('2');
        -> 50
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.htmlŻ2ß   DEALLOCATE PREPARE TSyntax:
{DEALLOCATE | DROP} PREPARE stmt_name

To deallocate a prepared statement produced with PREPARE, use a
DEALLOCATE PREPARE statement that refers to the prepared statement
name. Attempting to execute a prepared statement after deallocating it
results in an error.

URL: http://dev.mysql.com/doc/refman/5.0/en/deallocate-prepare.html

>http://dev.mysql.com/doc/refman/5.0/en/deallocate-prepare.html ]"ŕ   ENVELOPE! vEnvelope(g)

Returns the Minimum Bounding Rectangle (MBR) for the geometry value g.
The result is returned as a Polygon value.

The polygon is defined by the corner points of the bounding box:

POLYGON((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX MINY))

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions

gmysql> SELECT AsText(Envelope(GeomFromText('LineString(1 1,2 2)')));
+-------------------------------------------------------+
| AsText(Envelope(GeomFromText('LineString(1 1,2 2)'))) |
+-------------------------------------------------------+
| POLYGON((1 1,2 1,2 2,1 2,1 1))                        |
+-------------------------------------------------------+
khttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions 2á   IS_FREE_LOCK >Syntax:
IS_FREE_LOCK(str)

Checks whether the lock named str is free to use (that is, not locked).
Returns 1 if the lock is free (no one is using the lock), 0 if the lock
is in use, and NULL if an error occurs (such as an incorrect argument).

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.htmlń2â   TOUCHES wTouches(g1,g2)

Returns 1 or 0 to indicate whether g1 spatially touches g2. Two
geometries spatially touch if the interiors of the geometries do not
intersect, but the boundary of one of the geometries intersects either
the boundary or the interior of the other.

URL: http://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html

hhttp://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.htmlł"ă   	INET_ATON Syntax:
INET_ATON(expr)

Given the dotted-quad representation of a network address as a string,
returns an integer that represents the numeric value of the address.
Addresses may be 4- or 8-byte addresses.

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

A mysql> SELECT INET_ATON('209.207.224.40');
        -> 3520061480
Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html O"ä   
UNCOMPRESS
 vSyntax:
UNCOMPRESS(string_to_uncompress)

Uncompresses a string compressed by the COMPRESS() function. If the
argument is not a compressed value, the result is NULL. This function
requires MySQL to have been compiled with a compression library such as
zlib. Otherwise, the return value is always NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

‚ mysql> SELECT UNCOMPRESS(COMPRESS('any string'));
        -> 'any string'
mysql> SELECT UNCOMPRESS('any string');
        -> NULL
@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html ô "ĺ   AUTO_INCREMENT ź The AUTO_INCREMENT attribute can be used to generate a unique identity
for new rows:

URL: http://dev.mysql.com/doc/refman/5.0/en/example-auto-increment.html

ř CREATE TABLE animals (
     id MEDIUMINT NOT NULL AUTO_INCREMENT,
     name CHAR(30) NOT NULL,
     PRIMARY KEY (id)
 );

INSERT INTO animals (name) VALUES
    ('dog'),('cat'),('penguin'),
    ('lax'),('whale'),('ostrich');

SELECT * FROM animals;
Bhttp://dev.mysql.com/doc/refman/5.0/en/example-auto-increment.html2ć   ISSIMPLE! ˇIsSimple(g)

Currently, this function is a placeholder and should not be used. If
implemented, its behavior will be as described in the next paragraph.

Returns 1 if the geometry value g has no anomalous geometric points,
such as self-intersection or self-tangency. IsSimple() returns 0 if the
argument is not simple, and -1 if it is NULL.

The description of each instantiable geometric class given earlier in
the chapter includes the specific conditions that cause an instance of
that class to be classified as not simple. (See [HELP Geometry
hierarchy].)

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions

khttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions  Ö"ç   - BINARY ` Syntax:
-

Subtraction:

URL: http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html

! mysql> SELECT 3-5;
        -> -2
@http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html  ` 2č   GEOMCOLLFROMTEXT đ GeomCollFromText(wkt[,srid]), GeometryCollectionFromText(wkt[,srid])

Constructs a GEOMETRYCOLLECTION value using its WKT representation and
SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions ˙2é   WKT DEFINITION ¬ The Well-Known Text (WKT) representation of Geometry is designed to
exchange geometry data in ASCII form.

URL: http://dev.mysql.com/doc/refman/5.0/en/gis-wkt-format.html

:http://dev.mysql.com/doc/refman/5.0/en/gis-wkt-format.html 2ę   CURRENT_TIME ­ Syntax:
CURRENT_TIME, CURRENT_TIME()

CURRENT_TIME and CURRENT_TIME() are synonyms for CURTIME().

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html í2ë   REVOKE ŞSyntax:
REVOKE
    priv_type [(column_list)]
      [, priv_type [(column_list)]] ...
    ON [object_type] priv_level
    FROM user [, user] ...

REVOKE ALL PRIVILEGES, GRANT OPTION
    FROM user [, user] ...

The REVOKE statement enables system administrators to revoke privileges
from MySQL accounts. Each account is named using the same format as for
the GRANT statement; for example, 'jeffrey'@'localhost'. If you specify
only the user name part of the account name, a host name part of '%' is
used. For details on the levels at which privileges exist, the
allowable priv_type and priv_level values, and the syntax for
specifying users and passwords, see [HELP GRANT]

To use the first REVOKE syntax, you must have the GRANT OPTION
privilege, and you must have the privileges that you are revoking.

To revoke all privileges, use the second syntax, which drops all
global, database, table, column, and routine privileges for the named
user or users:

REVOKE ALL PRIVILEGES, GRANT OPTION FROM user [, user] ...

To use this REVOKE syntax, you must have the global CREATE USER
privilege or the UPDATE privilege for the mysql database.

URL: http://dev.mysql.com/doc/refman/5.0/en/revoke.html

2http://dev.mysql.com/doc/refman/5.0/en/revoke.html	| 2ě   LAST_INSERT_ID "	Syntax:
LAST_INSERT_ID(), LAST_INSERT_ID(expr)

LAST_INSERT_ID() (with no argument) returns the first automatically
generated value that was set for an AUTO_INCREMENT column by the most
recently executed INSERT statement to affect such a column. For
example, after inserting a row that generates an AUTO_INCREMENT value,
you can get the value like this:

mysql> SELECT LAST_INSERT_ID();
        -> 195

if a table contains an AUTO_INCREMENT column and INSERT ... ON
DUPLICATE KEY UPDATE updates (rather than inserts) a row, the value of
LAST_INSERT_ID() is not meaningful. For a workaround, see
http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html.

The currently executing statement does not affect the value of
LAST_INSERT_ID(). Suppose that you generate an AUTO_INCREMENT value
with one statement, and then refer to LAST_INSERT_ID() in a
multiple-row INSERT statement that inserts rows into a table with its
own AUTO_INCREMENT column. The value of LAST_INSERT_ID() will remain
stable in the second statement; its value for the second and later rows
is not affected by the earlier row insertions. (However, if you mix
references to LAST_INSERT_ID() and LAST_INSERT_ID(expr), the effect is
undefined.)

If the previous statement returned an error, the value of
LAST_INSERT_ID() is undefined. For transactional tables, if the
statement is rolled back due to an error, the value of LAST_INSERT_ID()
is left undefined. For manual ROLLBACK, the value of LAST_INSERT_ID()
is not restored to that before the transaction; it remains as it was at
the point of the ROLLBACK.

Within the body of a stored routine (procedure or function) or a
trigger, the value of LAST_INSERT_ID() changes the same way as for
statements executed outside the body of these kinds of objects. The
effect of a stored routine or trigger upon the value of
LAST_INSERT_ID() that is seen by following statements depends on the
kind of routine:

o If a stored procedure executes statements that change the value of
  LAST_INSERT_ID(), the changed value will be seen by statements that
  follow the procedure call.

o For stored functions and triggers that change the value, the value is
  restored when the function or trigger ends, so following statements
  will not see a changed value.

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html?"í   LAST_DAY î Syntax:
LAST_DAY(date)

Takes a date or datetime value and returns the corresponding value for
the last day of the month. Returns NULL if the argument is invalid.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

ů mysql> SELECT LAST_DAY('2003-02-05');
        -> '2003-02-28'
mysql> SELECT LAST_DAY('2004-02-05');
        -> '2004-02-29'
mysql> SELECT LAST_DAY('2004-01-01 01:01:01');
        -> '2004-01-31'
mysql> SELECT LAST_DAY('2003-03-32');
        -> NULL
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html *2î   	MEDIUMINT Ő MEDIUMINT[(M)] [UNSIGNED] [ZEROFILL]

A medium-sized integer. The signed range is -8388608 to 8388607. The
unsigned range is 0 to 16777215.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html  8 "ď   FLOOR ’ Syntax:
FLOOR(X)

Returns the largest integer value not greater than X.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

R mysql> SELECT FLOOR(1.23);
        -> 1
mysql> SELECT FLOOR(-1.23);
        -> -2
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html"đ   RTRIM" — Syntax:
RTRIM(str)

Returns the string str with trailing space characters removed.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

6 mysql> SELECT RTRIM('barbar   ');
        -> 'barbar'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html 52ń   EXPLAIN đSyntax:
EXPLAIN tbl_name

Or:

EXPLAIN [EXTENDED] SELECT select_options

The EXPLAIN statement can be used either as a synonym for DESCRIBE or
as a way to obtain information about how MySQL executes a SELECT
statement:

o EXPLAIN tbl_name is synonymous with DESCRIBE tbl_name or SHOW COLUMNS
  FROM tbl_name.

  For a description of the DESCRIBE and SHOW COLUMNS statements, see
  [HELP DESCRIBE], and [HELP SHOW COLUMNS].

o When you precede a SELECT statement with the keyword EXPLAIN, MySQL
  displays information from the optimizer about the query execution
  plan. That is, MySQL explains how it would process the SELECT,
  including information about how tables are joined and in which order.
  EXPLAIN EXTENDED can be used to provide additional information.

  For information regarding the use of EXPLAIN and EXPLAIN EXTENDED for
  obtaining query execution plan information, see
  http://dev.mysql.com/doc/refman/5.0/en/using-explain.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/explain.html

3http://dev.mysql.com/doc/refman/5.0/en/explain.htmlJ"ň   DEGREES ™ Syntax:
DEGREES(X)

Returns the argument X, converted from radians to degrees.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

[ mysql> SELECT DEGREES(PI());
        -> 180
mysql> SELECT DEGREES(PI() / 2);
        -> 90
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html  /2ó   VARCHAR Ý[NATIONAL] VARCHAR(M) [CHARACTER SET charset_name] [COLLATE
collation_name]

A variable-length string. M represents the maximum column length in
characters. In MySQL 5.0, the range of M is 0 to 255 before MySQL
5.0.3, and 0 to 65,535 in MySQL 5.0.3 and later. The effective maximum
length of a VARCHAR in MySQL 5.0.3 and later is subject to the maximum
row size (65,535 bytes, which is shared among all columns) and the
character set used. For example, utf8 characters can require up to
three bytes per character, so a VARCHAR column that uses the utf8
character set can be declared to be a maximum of 21,844 characters.

MySQL stores VARCHAR values as a one-byte or two-byte length prefix
plus data. The length prefix indicates the number of bytes in the
value. A VARCHAR column uses one length byte if values require no more
than 255 bytes, two length bytes if values may require more than 255
bytes.

*Note*: Before 5.0.3, trailing spaces were removed when VARCHAR values
were stored, which differs from the standard SQL specification.

Prior to MySQL 5.0.3, a VARCHAR column with a length specification
greater than 255 is converted to the smallest TEXT type that can hold
values of the given length. For example, VARCHAR(500) is converted to
TEXT, and VARCHAR(200000) is converted to MEDIUMTEXT. However, this
conversion affects trailing-space removal.

VARCHAR is shorthand for CHARACTER VARYING. NATIONAL VARCHAR is the
standard SQL way to define that a VARCHAR column should use some
predefined character set. MySQL 4.1 and up uses utf8 as this predefined
character set.
http://dev.mysql.com/doc/refman/5.0/en/charset-national.html. NVARCHAR
is shorthand for NATIONAL VARCHAR.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html m"ô   UNHEX" NSyntax:

UNHEX(str)

Performs the inverse operation of HEX(str). That is, it interprets each
pair of hexadecimal digits in the argument as a number and converts it
to the character represented by the number. The resulting characters
are returned as a binary string.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

Ń mysql> SELECT UNHEX('4D7953514C');
        -> 'MySQL'
mysql> SELECT 0x4D7953514C;
        -> 'MySQL'
mysql> SELECT UNHEX(HEX('string'));
        -> 'string'
mysql> SELECT HEX(UNHEX('1267'));
        -> '1267'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html"ő   - UNARY  Syntax:
-

Unary minus. This operator changes the sign of the argument.

URL: http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html

! mysql> SELECT - 2;
        -> -2
@http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.htmlţ"ö   SELECT INTO wSyntax:
SELECT col_name [, col_name] ...
    INTO var_name [, var_name] ...
    table_expr

SELECT ... INTO syntax enables selected columns to be stored directly
into variables. The query should return a single row. If the query
returns no rows, a warning with error code 1329 occurs (No data), and
the variable values remain unchanged. If the query returns multiple
rows, error 1172 occurs (Result consisted of more than one row). If it
is possible that the statement may retrieve multiple rows, you can use
LIMIT 1 to limit the result set to a single row.

URL: http://dev.mysql.com/doc/refman/5.0/en/select-into-statement.html

. SELECT id,data INTO x,y FROM test.t1 LIMIT 1;
Ahttp://dev.mysql.com/doc/refman/5.0/en/select-into-statement.html  ‰2÷   STD =Syntax:
STD(expr)

Returns the population standard deviation of expr. This is an extension
to standard SQL. As of MySQL 5.0.3, the standard SQL function
STDDEV_POP() can be used instead.

This function returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html	"ř   COS  Syntax:
COS(X)

Returns the cosine of X, where X is given in radians.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

' mysql> SELECT COS(PI());
        -> -1
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html?"ů   DATE FUNCTION ź Syntax:
DATE(expr)

Extracts the date part of the date or datetime expression expr.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

C mysql> SELECT DATE('2003-12-31 01:02:03');
        -> '2003-12-31'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html Ě 2ú   DROP TRIGGER$ }Syntax:
DROP TRIGGER [IF EXISTS] [schema_name.]trigger_name

This statement drops a trigger. The schema (database) name is optional.
If the schema is omitted, the trigger is dropped from the default
schema. DROP TRIGGER was added in MySQL 5.0.2. Its use requires the
SUPER privilege.

Use IF EXISTS to prevent an error from occurring for a trigger that
does not exist. A NOTE is generated for a nonexistent trigger when
using IF EXISTS. See [HELP SHOW WARNINGS]. The IF EXISTS clause was
added in MySQL 5.0.32.

Triggers for a table are also dropped if you drop the table.

URL: http://dev.mysql.com/doc/refman/5.0/en/drop-trigger.html

8http://dev.mysql.com/doc/refman/5.0/en/drop-trigger.htmlv2ű   RESET MASTER 'Syntax:
RESET MASTER

Deletes all binary logs listed in the index file, resets the binary log
index file to be empty, and creates a new binary log file. It is
intended to be used only when the master is started for the first time.

URL: http://dev.mysql.com/doc/refman/5.0/en/reset-master.html

8http://dev.mysql.com/doc/refman/5.0/en/reset-master.html  R"ü   TAN ‘ Syntax:
TAN(X)

Returns the tangent of X, where X is given in radians.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

o mysql> SELECT TAN(PI());
        -> -1.2246063538224e-16
mysql> SELECT TAN(PI()+1);
        -> 1.5574077246549
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html  ¬ "ý   PI ę Syntax:
PI()

Returns the value of Ď€ (pi). The default number of decimal places
displayed is seven, but MySQL uses the full double-precision value
internally.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

q mysql> SELECT PI();
        -> 3.141593
mysql> SELECT PI()+0.000000000000000000;
        -> 3.141592653589793116
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.htmlŽ"ţ   
WEEKOFYEAR ˙ Syntax:
WEEKOFYEAR(date)

Returns the calendar week of the date as a number in the range from 1
to 53. WEEKOFYEAR() is a compatibility function that is equivalent to
WEEK(date,3).

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

5 mysql> SELECT WEEKOFYEAR('2008-02-20');
        -> 8
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html   Î"˙   / ] Syntax:
/

Division:

URL: http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html

# mysql> SELECT 3/5;
        -> 0.60
@http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html  K"   PURGE BINARY LOGS šSyntax:
PURGE { BINARY | MASTER } LOGS
    { TO 'log_name' | BEFORE datetime_expr }

The binary log is a set of files that contain information about data
modifications made by the MySQL server. The log consists of a set of
binary log files, plus an index file.

The PURGE BINARY LOGS statement deletes all the binary log files listed
in the log index file prior to the specified log file name or date. The
log files also are removed from the list recorded in the index file, so
that the given log file becomes the first.

This statement has no effect if the --log-bin option has not been
enabled.

URL: http://dev.mysql.com/doc/refman/5.0/en/purge-binary-logs.html

V PURGE BINARY LOGS TO 'mysql-bin.010';
PURGE BINARY LOGS BEFORE '2008-04-02 22:46:26';
=http://dev.mysql.com/doc/refman/5.0/en/purge-binary-logs.html g2  STDDEV_SAMP Syntax:
STDDEV_SAMP(expr)

Returns the sample standard deviation of expr (the square root of
VAR_SAMP(). This function was added in MySQL 5.0.3.

STDDEV_SAMP() returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html  ő2  SCHEMA Ł Syntax:
SCHEMA()

This function is a synonym for DATABASE(). It was added in MySQL 5.0.2.

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.htmlQ2  MLINEFROMWKB ĺ MLineFromWKB(wkb[,srid]), MultiLineStringFromWKB(wkb[,srid])

Constructs a MULTILINESTRING value using its WKB representation and
SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions$ "  LOG2 ~ Syntax:
LOG2(X)

Returns the base-2 logarithm of X.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

S mysql> SELECT LOG2(65536);
        -> 16
mysql> SELECT LOG2(-100);
        -> NULL
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html#"  SUBTIME Syntax:
SUBTIME(expr1,expr2)

SUBTIME() returns expr1 - expr2 expressed as a value in the same format
as expr1. expr1 is a time or datetime expression, and expr2 is a time
expression.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

É mysql> SELECT SUBTIME('2007-12-31 23:59:59.999999','1 1:1:1.000002');
        -> '2007-12-30 22:58:58.999997'
mysql> SELECT SUBTIME('01:00:00.999999', '02:00:00.999998');
        -> '-00:59:59.999999'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html n"  UNCOMPRESSED_LENGTH
 Ă Syntax:
UNCOMPRESSED_LENGTH(compressed_string)

Returns the length that the compressed string had before being
compressed.

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

K mysql> SELECT UNCOMPRESSED_LENGTH(COMPRESS(REPEAT('a',30)));
        -> 30
@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html  ` 2  
DROP TABLE$ Syntax:
DROP [TEMPORARY] TABLE [IF EXISTS]
    tbl_name [, tbl_name] ...
    [RESTRICT | CASCADE]

DROP TABLE removes one or more tables. You must have the DROP privilege
for each table. All table data and the table definition are removed, so
be careful with this statement! If any of the tables named in the
argument list do not exist, MySQL returns an error indicating by name
which nonexisting tables it was unable to drop, but it also drops all
of the tables in the list that do exist.

*Important*: When a table is dropped, user privileges on the table are
not automatically dropped. See [HELP GRANT].

Use IF EXISTS to prevent an error from occurring for tables that do not
exist. A NOTE is generated for each nonexistent table when using IF
EXISTS. See [HELP SHOW WARNINGS].

RESTRICT and CASCADE are allowed to make porting easier. In MySQL 5.0,
they do nothing.

*Note*: DROP TABLE automatically commits the current active
transaction, unless you use the TEMPORARY keyword.

URL: http://dev.mysql.com/doc/refman/5.0/en/drop-table.html

6http://dev.mysql.com/doc/refman/5.0/en/drop-table.html-"  POW Ť Syntax:
POW(X,Y)

Returns the value of X raised to the power of Y.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

N mysql> SELECT POW(2,2);
        -> 4
mysql> SELECT POW(2,-2);
        -> 0.25
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html  "	  SHOW CREATE TABLE ŇSyntax:
SHOW CREATE TABLE tbl_name

Shows the CREATE TABLE statement that creates the given table. The
statement requires the SELECT privilege for the table. As of MySQL
5.0.1, this statement also works with views.
SHOW CREATE TABLE quotes table and column names according to the value
of the sql_quote_show_create option. See
http://dev.mysql.com/doc/refman/5.0/en/server-session-variables.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-create-table.html

ó mysql> SHOW CREATE TABLE t\G
*************************** 1. row ***************************
       Table: t
Create Table: CREATE TABLE t (
  id INT(11) default NULL auto_increment,
  s char(60) default NULL,
  PRIMARY KEY (id)
) ENGINE=MyISAM
=http://dev.mysql.com/doc/refman/5.0/en/show-create-table.htmlę2
  DUAL ©You are allowed to specify DUAL as a dummy table name in situations
where no tables are referenced:

mysql> SELECT 1 + 1 FROM DUAL;
        -> 2

DUAL is purely for the convenience of people who require that all
SELECT statements should have FROM and possibly other clauses. MySQL
may ignore the clauses. MySQL does not require FROM DUAL if no tables
are referenced.

URL: http://dev.mysql.com/doc/refman/5.0/en/select.html

2http://dev.mysql.com/doc/refman/5.0/en/select.html  Ň"  INSTR" Syntax:
INSTR(str,substr)

Returns the position of the first occurrence of substring substr in
string str. This is the same as the two-argument form of LOCATE(),
except that the order of the arguments is reversed.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

j mysql> SELECT INSTR('foobarbar', 'bar');
        -> 4
mysql> SELECT INSTR('xbar', 'foobar');
        -> 0
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  ˙"  NOW <Syntax:
NOW()

Returns the current date and time as a value in 'YYYY-MM-DD HH:MM:SS'
or YYYYMMDDHHMMSS.uuuuuu format, depending on whether the function is
used in a string or numeric context. The value is expressed in the
current time zone.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

p mysql> SELECT NOW();
        -> '2007-12-15 23:50:26'
mysql> SELECT NOW() + 0;
        -> 20071215235026.000000
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html ś 2  SHOW ENGINES MSyntax:
SHOW [STORAGE] ENGINES

SHOW ENGINES displays status information about the server's storage
engines. This is particularly useful for checking whether a storage
engine is supported, or to see what the default engine is. SHOW TABLE
TYPES is a deprecated synonym.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-engines.html

8http://dev.mysql.com/doc/refman/5.0/en/show-engines.html
î2  SHOW MUTEX STATUS •
Syntax:
SHOW MUTEX STATUS

SHOW MUTEX STATUS displays InnoDB mutex statistics. From MySQL 5.0.3 to
5.0.32, the statement displays the following output fields:

o Mutex

  The mutex name. The name indicates the mutex purpose. For example,
  the log_sys mutex is used by the InnoDB logging subsystem and
  indicates how intensive logging activity is. The buf_pool mutex
  protects the InnoDB buffer pool.

o Module

  The source file where the mutex is implemented.

o Count indicates how many times the mutex was requested.

o Spin_waits indicates how many times the spinlock had to run.

o Spin_rounds indicates the number of spinlock rounds. (spin_rounds
  divided by spin_waits provides the average round count.)

o OS_waits indicates the number of operating system waits. This occurs
  when the spinlock did not work (the mutex was not locked during the
  spinlock and it was necessary to yield to the operating system and
  wait).

o OS_yields indicates the number of times that a thread trying to lock
  a mutex gave up its timeslice and yielded to the operating system (on
  the presumption that allowing other threads to run will free the
  mutex so that it can be locked).

o OS_waits_time indicates the amount of time (in ms) spent in operating
  system waits, if the timed_mutexes system variable is 1 (ON). If
  timed_mutexes is 0 (OFF), timing is disabled, so OS_waits_time is 0.
  timed_mutexes is off by default.

From MySQL 5.0.33 on, the statement uses the same output format as that
just described, but only if UNIV_DEBUG was defined at MySQL compilation
time (for example, in include/univ.h in the InnoDB part of the MySQL
source tree). If UNIV_DEBUG was not defined, the statement displays the
following fields. In the latter case (without UNIV_DEBUG), the
information on which the statement output is based is insufficient to
distinguish regular mutexes and mutexes that protect rw-locks (which
allow multiple readers or a single writer). Consequently, the output
may appear to contain multiple rows for the same mutex.

o File

  The source file where the mutex is implemented.

o Line

  The line number in the source file where the mutex is created. This
  may change depending on your version of MySQL.

o OS_waits

  Same as OS_waits_time.

Information from this statement can be used to diagnose system
problems. For example, large values of spin_waits and spin_rounds may
indicate scalability problems.

SHOW MUTEX STATUS was added in MySQL 5.0.3. In MySQL 5.1, SHOW MUTEX
STATUS is renamed to SHOW ENGINE INNODB MUTEX. The latter statement
displays similar information but in a somewhat different output format.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-mutex-status.html

=http://dev.mysql.com/doc/refman/5.0/en/show-mutex-status.html   Ý"  >= k Syntax:
>=

Greater than or equal:

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

# mysql> SELECT 2 >= 2;
        -> 1
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.htmlŇ"  EXP ů Syntax:
EXP(X)

Returns the value of e (the base of natural logarithms) raised to the
power of X. The inverse of this function is LOG() (using a single
argumentonly) or LN().

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

‡ mysql> SELECT EXP(2);
        -> 7.3890560989307
mysql> SELECT EXP(-2);
        -> 0.13533528323661
mysql> SELECT EXP(0);
        -> 1
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html  ô 2  LONGBLOB ˇLONGBLOB

A BLOB column with a maximum length of 4,294,967,295 or 4GB (232 - 1)
bytes. The effective maximum length of LONGBLOB columns depends on the
configured maximum packet size in the client/server protocol and
available memory. Each LONGBLOB value is stored using a four-byte
length prefix that indicates the number of bytes in the value.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.htmls"  POINTN Ô PointN(ls,N)

Returns the N-th Point in the Linestring value ls. Points are numbered
beginning with 1.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#linestring-property-functions

'mysql> SET @ls = 'LineString(1 1,2 2,3 3)';
mysql> SELECT AsText(PointN(GeomFromText(@ls),2));
+-------------------------------------+
| AsText(PointN(GeomFromText(@ls),2)) |
+-------------------------------------+
| POINT(2 2)                          |
+-------------------------------------+
ehttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#linestring-property-functions )2  YEAR DATA TYPE ÉYEAR[(2|4)]

A year in two-digit or four-digit format. The default is four-digit
format. In four-digit format, the allowable values are 1901 to 2155,
and 0000. In two-digit format, the allowable values are 70 to 69,
representing years from 1970 to 2069. MySQL displays YEAR values in
YYYY format, but allows you to assign values to YEAR columns using
either strings or numbers.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-type-overview.html

Ghttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-type-overview.html‡2  SUM ;Syntax:
SUM([DISTINCT] expr)

Returns the sum of expr. If the return set has no rows, SUM() returns
NULL. The DISTINCT keyword can be used in MySQL 5.0 to sum only the
distinct values of expr.

SUM() returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html f"  OCT" ó Syntax:
OCT(N)

Returns a string representation of the octal value of N, where N is a
longlong (BIGINT) number. This is equivalent to CONV(N,10,8). Returns
NULL if N is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

' mysql> SELECT OCT(12);
        -> '14'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  ˛2  SYSDATE ]Syntax:
SYSDATE()

Returns the current date and time as a value in 'YYYY-MM-DD HH:MM:SS'
or YYYYMMDDHHMMSS.uuuuuu format, depending on whether the function is
used in a string or numeric context.

As of MySQL 5.0.12, SYSDATE() returns the time at which it executes.
This differs from the behavior for NOW(), which returns a constant time
that indicates the time at which the statement began to execute.
(Within a stored function or trigger, NOW() returns the time at which
the function or triggering statement began to execute.)

mysql> SELECT NOW(), SLEEP(2), NOW();
+---------------------+----------+---------------------+
| NOW()               | SLEEP(2) | NOW()               |
+---------------------+----------+---------------------+
| 2006-04-12 13:47:36 |        0 | 2006-04-12 13:47:36 |
+---------------------+----------+---------------------+

mysql> SELECT SYSDATE(), SLEEP(2), SYSDATE();
+---------------------+----------+---------------------+
| SYSDATE()           | SLEEP(2) | SYSDATE()           |
+---------------------+----------+---------------------+
| 2006-04-12 13:47:44 |        0 | 2006-04-12 13:47:46 |
+---------------------+----------+---------------------+

In addition, the SET TIMESTAMP statement affects the value returned by
NOW() but not by SYSDATE(). This means that timestamp settings in the
binary log have no effect on invocations of SYSDATE().

Because SYSDATE() can return different values even within the same
statement, and is not affected by SET TIMESTAMP, it is nondeterministic
and therefore unsafe for replication. If that is a problem, you can
start the server with the --sysdate-is-now option to cause SYSDATE() to
be an alias for NOW(). The nondeterministic nature of SYSDATE() also
means that indexes cannot be used for evaluating expressions that refer
to it.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  n"  ASBINARY ŕ AsBinary(g), AsWKB(g)

Converts a value in internal geometry format to its WKB representation
and returns the binary result.

URL: http://dev.mysql.com/doc/refman/5.0/en/functions-to-convert-geometries-between-formats.html

 SELECT AsBinary(g) FROM geom;
[http://dev.mysql.com/doc/refman/5.0/en/functions-to-convert-geometries-between-formats.html  “"  REPEAT FUNCTION" ü Syntax:
REPEAT(str,count)

Returns a string consisting of the string str repeated count times. If
count is less than 1, returns an empty string. Returns NULL if str or
count are NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

? mysql> SELECT REPEAT('MySQL', 3);
        -> 'MySQLMySQLMySQL'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html 2  SHOW TABLES ŃSyntax:
SHOW [FULL] TABLES [{FROM | IN} db_name]
    [LIKE 'pattern' | WHERE expr]

SHOW TABLES lists the non-TEMPORARY tables in a given database. You can
also get this list using the mysqlshow db_name command. The LIKE
clause, if present, indicates which table names to match. The WHERE
clause can be given to select rows using more general conditions, as
discussed in http://dev.mysql.com/doc/refman/5.0/en/extended-show.html.

Before MySQL 5.0.1, the output from SHOW TABLES contains a single
column of table names. Beginning with MySQL 5.0.1, this statement also
lists any views in the database. As of MySQL 5.0.2, the FULL modifier
is supported such that SHOW FULL TABLES displays a second output
column. Values for the second column are BASE TABLE for a table and
VIEW for a view.

If you have no privileges for a base table or view, it does not show up
in the output from SHOW TABLES or mysqlshow db_name.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-tables.html

7http://dev.mysql.com/doc/refman/5.0/en/show-tables.html  "  MAKEDATE Ř Syntax:
MAKEDATE(year,dayofyear)

Returns a date, given year and day-of-year values. dayofyear must be
greater than 0 or the result is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

ć mysql> SELECT MAKEDATE(2011,31), MAKEDATE(2011,32);
        -> '2011-01-31', '2011-02-01'
mysql> SELECT MAKEDATE(2011,365), MAKEDATE(2014,365);
        -> '2011-12-31', '2014-12-31'
mysql> SELECT MAKEDATE(2011,0);
        -> NULL
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  ť"  BINARY OPERATOR" źSyntax:
BINARY

The BINARY operator casts the string following it to a binary string.
This is an easy way to force a column comparison to be done byte by
byte rather than character by character. This causes the comparison to
be case sensitive even if the column isn't defined as BINARY or BLOB.
BINARY also causes trailing spaces to be significant.

URL: http://dev.mysql.com/doc/refman/5.0/en/cast-functions.html

¨ mysql> SELECT 'a' = 'A';
        -> 1
mysql> SELECT BINARY 'a' = 'A';
        -> 0
mysql> SELECT 'a' = 'a ';
        -> 1
mysql> SELECT BINARY 'a' = 'a ';
        -> 0
:http://dev.mysql.com/doc/refman/5.0/en/cast-functions.htmlÜ 2  MBROVERLAPS MBROverlaps(g1,g2)

Returns 1 or 0 to indicate whether the Minimum Bounding Rectangles of
the two geometries g1 and g2 overlap. The term spatially overlaps is
used if two geometries intersect and their intersection results in a
geometry of the same dimension but not equal to either of the given
geometries.

URL: http://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.html

Ehttp://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.htmlŢ"  SOUNDEX"  Syntax:
SOUNDEX(str)

Returns a soundex string from str. Two strings that sound almost the
same should have identical soundex strings. A standard soundex string
is four characters long, but the SOUNDEX() function returns an
arbitrarily long string. You can use SUBSTRING() on the result to get a
standard soundex string. All nonalphabetic characters in str are
ignored. All international alphabetic characters outside the A-Z range
are treated as vowels.

*Important*: When using SOUNDEX(), you should be aware of the following
limitations:

o This function, as currently implemented, is intended to work well
  with strings that are in the English language only. Strings in other
  languages may not produce reliable results.

o This function is not guaranteed to provide consistent results with
  strings that use multi-byte character sets, including utf-8.

  We hope to remove these limitations in a future release. See
  Bug#22638 (http://bugs.mysql.com/22638) for more information.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

n mysql> SELECT SOUNDEX('Hello');
        -> 'H400'
mysql> SELECT SOUNDEX('Quadratically');
        -> 'Q36324'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  ß2  
MBRTOUCHES …MBRTouches(g1,g2)

Returns 1 or 0 to indicate whether the Minimum Bounding Rectangles of
the two geometries g1 and g2 touch. Two geometries spatially touch if
the interiors of the geometries do not intersect, but the boundary of
one of the geometries intersects either the boundary or the interior of
the other.

URL: http://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.html

Ehttp://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.html 2  INSERT SELECT ÁSyntax:
INSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE]
    [INTO] tbl_name [(col_name,...)]
    SELECT ...
    [ ON DUPLICATE KEY UPDATE col_name=expr, ... ]

With INSERT ... SELECT, you can quickly insert many rows into a table
from one or many tables. For example:

INSERT INTO tbl_temp2 (fld_id)
  SELECT tbl_temp1.fld_order_id
  FROM tbl_temp1 WHERE tbl_temp1.fld_order_id > 100;

URL: http://dev.mysql.com/doc/refman/5.0/en/insert-select.html

9http://dev.mysql.com/doc/refman/5.0/en/insert-select.html  $Ř 2   CREATE PROCEDURE$ $Syntax:
CREATE
    [DEFINER = { user | CURRENT_USER }]
    PROCEDURE sp_name ([proc_parameter[,...]])
    [characteristic ...] routine_body

CREATE
    [DEFINER = { user | CURRENT_USER }]
    FUNCTION sp_name ([func_parameter[,...]])
    RETURNS type
    [characteristic ...] routine_body

proc_parameter:
    [ IN | OUT | INOUT ] param_name type

func_parameter:
    param_name type

type:
    Any valid MySQL data type

characteristic:
    LANGUAGE SQL
  | [NOT] DETERMINISTIC
  | { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }
  | SQL SECURITY { DEFINER | INVOKER }
  | COMMENT 'string'

routine_body:
    Valid SQL procedure statement

These statements create stored routines. By default, a routine is
associated with the default database. To associate the routine
explicitly with a given database, specify the name as db_name.sp_name
when you create it.

The CREATE FUNCTION statement is also used in MySQL to support UDFs
(user-defined functions). See
http://dev.mysql.com/doc/refman/5.0/en/adding-functions.html. A UDF can
be regarded as an external stored function. However, do note that
stored functions share their namespace with UDFs. See
http://dev.mysql.com/doc/refman/5.0/en/function-resolution.html, for
the rules describing how the server interprets references to different
kinds of functions.

To invoke a stored procedure, use the CALL statement (see [HELP CALL]).
To invoke a stored function, refer to it in an expression. The function
returns a value during expression evaluation.

As of MySQL 5.0.3, to execute the CREATE PROCEDURE or CREATE FUNCTION
statement, it is necessary to have the CREATE ROUTINE privilege. By
default, MySQL automatically grants the ALTER ROUTINE and EXECUTE
privileges to the routine creator. This behavior can be changed by
disabling the automatic_sp_privileges system variable. See
http://dev.mysql.com/doc/refman/5.0/en/stored-routines-privileges.html.
If binary logging is enabled, the CREATE FUNCTION statement might also
require the SUPER privilege, as described in
http://dev.mysql.com/doc/refman/5.0/en/stored-programs-logging.html.

The DEFINER and SQL SECURITY clauses specify the security context to be
used when checking access privileges at routine execution time, as
described later.

If the routine name is the same as the name of a built-in SQL function,
a syntax error occurs unless you use a space between the name and the
following parenthesis when defining the routine or invoking it later.
For this reason, avoid using the names of existing SQL functions for
your own stored routines.

The IGNORE_SPACE SQL mode applies to built-in functions, not to stored
routines. It is always allowable to have spaces after a stored routine
name, regardless of whether IGNORE_SPACE is enabled.

The parameter list enclosed within parentheses must always be present.
If there are no parameters, an empty parameter list of () should be
used. Parameter names are not case sensitive.

Each parameter is an IN parameter by default. To specify otherwise for
a parameter, use the keyword OUT or INOUT before the parameter name.

*Note*: Specifying a parameter as IN, OUT, or INOUT is valid only for a
PROCEDURE. (FUNCTION parameters are always regarded as IN parameters.)

An IN parameter passes a value into a procedure. The procedure might
modify the value, but the modification is not visible to the caller
when the procedure returns. An OUT parameter passes a value from the
procedure back to the caller. Its initial value is NULL within the
procedure, and its value is visible to the caller when the procedure
returns. An INOUT parameter is initialized by the caller, can be
modified by the procedure, and any change made by the procedure is
visible to the caller when the procedure returns.

For each OUT or INOUT parameter, pass a user-defined variable in the
CALL statement that invokes the procedure so that you can obtain its
value when the procedure returns. If you are calling the procedure from
within another stored procedure or function, you can also pass a
routine parameter or local routine variable as an IN or INOUT
parameter.

The following example shows a simple stored procedure that uses an OUT
parameter:

mysql> delimiter //

mysql> CREATE PROCEDURE simpleproc (OUT param1 INT)
    -> BEGIN
    ->   SELECT COUNT(*) INTO param1 FROM t;
    -> END//
Query OK, 0 rows affected (0.00 sec)

mysql> delimiter ;

mysql> CALL simpleproc(@a);
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT @a;
+------+
| @a   |
+------+
| 3    |
+------+
1 row in set (0.00 sec)

The example uses the mysql client delimiter command to change the
statement delimiter from ; to // while the procedure is being defined.
This allows the ; delimiter used in the procedure body to be passed
through to the server rather than being interpreted by mysql itself.
See
http://dev.mysql.com/doc/refman/5.0/en/stored-programs-defining.html.

The RETURNS clause may be specified only for a FUNCTION, for which it
is mandatory. It indicates the return type of the function, and the
function body must contain a RETURN value statement. If the RETURN
statement returns a value of a different type, the value is coerced to
the proper type. For example, if a function specifies an ENUM or SET
value in the RETURNS clause, but the RETURN statement returns an
integer, the value returned from the function is the string for the
corresponding ENUM member of set of SET members.

The following example function takes a parameter, performs an operation
using an SQL function, and returns the result. In this case, it is
unnecessary to use delimiter because the function definition contains
no internal ; statement delimiters:

mysql> CREATE FUNCTION hello (s CHAR(20))
mysql> RETURNS CHAR(50) DETERMINISTIC
    -> RETURN CONCAT('Hello, ',s,'!');
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT hello('world');
+----------------+
| hello('world') |
+----------------+
| Hello, world!  |
+----------------+
1 row in set (0.00 sec)

Parameter types and function return types can be declared to use any
valid data type, except that the COLLATE attribute cannot be used.

The routine_body consists of a valid SQL procedure statement. This can
be a simple statement such as SELECT or INSERT, or it can be a compound
statement written using BEGIN and END. Compound statements can contain
declarations, loops, and other control structure statements. The syntax
for these statements is described in
http://dev.mysql.com/doc/refman/5.0/en/sql-syntax-compound-statements.h
tml.

MySQL allows routines to contain DDL statements, such as CREATE and
DROP. MySQL also allows stored procedures (but not stored functions) to
contain SQL transaction statements such as COMMIT. Stored functions may
not contain statements that perform explicit or implicit commit or
rollback. Support for these statements is not required by the SQL
standard, which states that each DBMS vendor may decide whether to
allow them.

Statements that return a result set can be used within a stored
procedcure but not within a stored function. This prohibition includes
SELECT statements that do not have an INTO var_list clause and other
statements such as SHOW, EXPLAIN, and CHECK TABLE. For statements that
can be determined at function definition time to return a result set, a
Not allowed to return a result set from a function error occurs
(ER_SP_NO_RETSET). For statements that can be determined only at
runtime to return a result set, a PROCEDURE %s can't return a result
set in the given context error occurs (ER_SP_BADSELECT).

*Note*: Before MySQL 5.0.10, stored functions created with CREATE
FUNCTION must not contain references to tables, with limited
exceptions. They may include some SET statements that contain table
references, for example SET a:= (SELECT MAX(id) FROM t), and SELECT
statements that fetch values directly into variables, for example
SELECT i INTO var1 FROM t.

USE statements within stored routines are disallowed. When a routine is
invoked, an implicit USE db_name is performed (and undone when the
routine terminates). The causes the routine to have the given default
database while it executes. References to objects in databases other
than the routine default database should be qualified with the
appropriate database name.

For additional information about statements that are not allowed in
stored routines, see
http://dev.mysql.com/doc/refman/5.0/en/stored-program-restrictions.html
.

For information about invoking stored procedures from within programs
written in a language that has a MySQL interface, see [HELP CALL].

MySQL stores the sql_mode system variable setting that is in effect at
the time a routine is created, and always executes the routine with
this setting in force, regardless of the server SQL mode in effect when
the routine is invoked.

The switch from the SQL mode of the invoker to that of the routine
occurs after evaluation of arguments and assignment of the resulting
values to routine parameters. If you define a routine in strict SQL
mode but invoke it in nonstrict mode, assignment of arguments to
routine parameters does not take place in strict mode. If you require
that expressions passed to a routine be assigned in strict SQL mode,
you should invoke the routine with strict mode in effect.

URL: http://dev.mysql.com/doc/refman/5.0/en/create-procedure.html

<http://dev.mysql.com/doc/refman/5.0/en/create-procedure.htmlV2!  	VARBINARY VARBINARY(M)

The VARBINARY type is similar to the VARCHAR type, but stores binary
byte strings rather than nonbinary character strings. M represents the
maximum column length in bytes.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html  …2"  
LOAD INDEX :Syntax:
LOAD INDEX INTO CACHE
  tbl_index_list [, tbl_index_list] ...

tbl_index_list:
  tbl_name
    [[INDEX|KEY] (index_name[, index_name] ...)]
    [IGNORE LEAVES]

The LOAD INDEX INTO CACHE statement preloads a table index into the key
cache to which it has been assigned by an explicit CACHE INDEX
statement, or into the default key cache otherwise. LOAD INDEX INTO
CACHE is used only for MyISAM tables.

The IGNORE LEAVES modifier causes only blocks for the nonleaf nodes of
the index to be preloaded.

URL: http://dev.mysql.com/doc/refman/5.0/en/load-index.html

6http://dev.mysql.com/doc/refman/5.0/en/load-index.html—2#  UNION VSyntax:
SELECT ...
UNION [ALL | DISTINCT] SELECT ...
[UNION [ALL | DISTINCT] SELECT ...]

UNION is used to combine the result from multiple SELECT statements
into a single result set.

The column names from the first SELECT statement are used as the column
names for the results returned. Selected columns listed in
corresponding positions of each SELECT statement should have the same
data type. (For example, the first column selected by the first
statement should have the same type as the first column selected by the
other statements.)

URL: http://dev.mysql.com/doc/refman/5.0/en/union.html

1http://dev.mysql.com/doc/refman/5.0/en/union.html l "$  TO_DAYS ­ Syntax:
TO_DAYS(date)

Given a date date, returns a day number (the number of days since year
0).

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

h mysql> SELECT TO_DAYS(950501);
        -> 728779
mysql> SELECT TO_DAYS('2007-10-07');
        -> 733321
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html Ý2%  
NOT REGEXP" – Syntax:
expr NOT REGEXP pat, expr NOT RLIKE pat

This is the same as NOT (expr REGEXP pat).

URL: http://dev.mysql.com/doc/refman/5.0/en/regexp.html

2http://dev.mysql.com/doc/refman/5.0/en/regexp.html72&  
SHOW INDEX ěSyntax:
SHOW {INDEX | INDEXES | KEYS}
    {FROM | IN} tbl_name
    [{FROM | IN} db_name]

SHOW INDEX returns table index information. The format resembles that
of the SQLStatistics call in ODBC.
The LIKE clause, if present, indicates which event names to match. The
WHERE clause can be given to select rows using more general conditions,
as discussed in
http://dev.mysql.com/doc/refman/5.0/en/extended-show.html.

You can use db_name.tbl_name as an alternative to the tbl_name FROM
db_name syntax. These two statements are equivalent:

SHOW INDEX FROM mytable FROM mydb;
SHOW INDEX FROM mydb.mytable;

You can also list a table's indexes with the mysqlshow -k db_name
tbl_name command.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-index.html

6http://dev.mysql.com/doc/refman/5.0/en/show-index.html "'  SHOW CREATE DATABASE 
Syntax:
SHOW CREATE {DATABASE | SCHEMA} db_name

Shows the CREATE DATABASE statement that creates the given database.
SHOW CREATE SCHEMA is a synonym for SHOW CREATE DATABASE as of MySQL
5.0.2.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-create-database.html

łmysql> SHOW CREATE DATABASE test\G
*************************** 1. row ***************************
       Database: test
Create Database: CREATE DATABASE `test`
                 /*!40100 DEFAULT CHARACTER SET latin1 */

mysql> SHOW CREATE SCHEMA test\G
*************************** 1. row ***************************
       Database: test
Create Database: CREATE DATABASE `test`
                 /*!40100 DEFAULT CHARACTER SET latin1 */
@http://dev.mysql.com/doc/refman/5.0/en/show-create-database.html  E2(  LEAVE ú Syntax:
LEAVE label

This statement is used to exit the flow control construct that has the
given label. It can be used within BEGIN ... END or loop constructs
(LOOP, REPEAT, WHILE).

URL: http://dev.mysql.com/doc/refman/5.0/en/leave-statement.html

;http://dev.mysql.com/doc/refman/5.0/en/leave-statement.html é2)  NOT IN  Syntax:
expr NOT IN (value,...)

This is the same as NOT (expr IN (value,...)).

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.htmlż"*  ! Á Syntax:
NOT, !

Logical NOT. Evaluates to 1 if the operand is 0, to 0 if the operand is
nonzero, and NOT NULL returns NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/logical-operators.html

ł mysql> SELECT NOT 10;
        -> 0
mysql> SELECT NOT 0;
        -> 1
mysql> SELECT NOT NULL;
        -> NULL
mysql> SELECT ! (1+1);
        -> 0
mysql> SELECT ! 1+1;
        -> 1
=http://dev.mysql.com/doc/refman/5.0/en/logical-operators.html "+  DECLARE HANDLER ]	Syntax:
DECLARE handler_type HANDLER
    FOR condition_value [, condition_value] ...
    statement

handler_type:
    CONTINUE
  | EXIT
  | UNDO

condition_value:
    SQLSTATE [VALUE] sqlstate_value
  | condition_name
  | SQLWARNING
  | NOT FOUND
  | SQLEXCEPTION
  | mysql_error_code

The DECLARE ... HANDLER statement specifies handlers that each may deal
with one or more conditions. If one of these conditions occurs, the
specified statement is executed. statement can be a simple statement
(for example, SET var_name = value), or it can be a compound statement
written using BEGIN and END (see [HELP BEGIN END]).

For a CONTINUE handler, execution of the current program continues
after execution of the handler statement. For an EXIT handler,
execution terminates for the BEGIN ... END compound statement in which
the handler is declared. (This is true even if the condition occurs in
an inner block.) The UNDO handler type statement is not supported.

If a condition occurs for which no handler has been declared, the
default action is EXIT.

A condition_value for DECLARE ... HANDLER can be any of the following
values:

o An SQLSTATE value (a 5-character string literal) or a MySQL error
  code (a number). You should not use SQLSTATE value '00000' or MySQL
  error code 0, because those indicate sucess rather than an error
  condition. For a list of SQLSTATE values and MySQL error codes, see
  http://dev.mysql.com/doc/refman/5.0/en/error-messages-server.html.

o A condition name previously specified with DECLARE ... CONDITION. See
  [HELP DECLARE CONDITION].

o SQLWARNING is shorthand for the class of SQLSTATE values that begin
  with '01'.

o NOT FOUND is shorthand for the class of SQLSTATE values that begin
  with '02'. This is relevant only the context of cursors and is used
  to control what happens when a cursor reaches the end of a data set.
  If no more rows are available, a No Data condition occurs with
  SQLSTATE value 02000. To detect this condition, you can set up a
  handler for it (or for a NOT FOUND condition). An example is shown in
  http://dev.mysql.com/doc/refman/5.0/en/cursors.html. This condition
  also occurs for SELECT ... INTO var_list statements that retrieve no
  rows.

o SQLEXCEPTION is shorthand for the class of SQLSTATE values that do
  not begin with '00', '01', or '02'.

URL: http://dev.mysql.com/doc/refman/5.0/en/declare-handler.html

gmysql> CREATE TABLE test.t (s1 INT, PRIMARY KEY (s1));
Query OK, 0 rows affected (0.00 sec)

mysql> delimiter //

mysql> CREATE PROCEDURE handlerdemo ()
    -> BEGIN
    ->   DECLARE CONTINUE HANDLER FOR SQLSTATE '23000' SET @x2 = 1;
    ->   SET @x = 1;
    ->   INSERT INTO test.t VALUES (1);
    ->   SET @x = 2;
    ->   INSERT INTO test.t VALUES (1);
    ->   SET @x = 3;
    -> END;
    -> //
Query OK, 0 rows affected (0.00 sec)

mysql> CALL handlerdemo()//
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT @x//
    +------+
    | @x   |
    +------+
    | 3    |
    +------+
    1 row in set (0.00 sec)
;http://dev.mysql.com/doc/refman/5.0/en/declare-handler.html Q2,  DOUBLE ˙DOUBLE[(M,D)] [UNSIGNED] [ZEROFILL]

A normal-size (double-precision) floating-point number. Allowable
values are -1.7976931348623157E+308 to -2.2250738585072014E-308, 0, and
2.2250738585072014E-308 to 1.7976931348623157E+308. These are the
theoretical limits, based on the IEEE standard. The actual range might
be slightly smaller depending on your hardware or operating system.

M is the total number of digits and D is the number of digits following
the decimal point. If M and D are omitted, values are stored to the
limits allowed by the hardware. A double-precision floating-point
number is accurate to approximately 15 decimal places.

UNSIGNED, if specified, disallows negative values.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html_2-  TIME 	TIME

A time. The range is '-838:59:59' to '838:59:59'. MySQL displays TIME
values in 'HH:MM:SS' format, but allows assignment of values to TIME
columns using either strings or numbers.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-type-overview.html

Ghttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-type-overview.html ă".  && Ü Syntax:
AND, &&

Logical AND. Evaluates to 1 if all operands are nonzero and not NULL,
to 0 if one or more operands are 0, otherwise NULL is returned.

URL: http://dev.mysql.com/doc/refman/5.0/en/logical-operators.html

» mysql> SELECT 1 && 1;
        -> 1
mysql> SELECT 1 && 0;
        -> 0
mysql> SELECT 1 && NULL;
        -> NULL
mysql> SELECT 0 && NULL;
        -> 0
mysql> SELECT NULL && 0;
        -> 0
=http://dev.mysql.com/doc/refman/5.0/en/logical-operators.html đ "/  X	 » X(p)

Returns the X-coordinate value for the point p as a double-precision
number.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#point-property-functions

Ç mysql> SET @pt = 'Point(56.7 53.34)';
mysql> SELECT X(GeomFromText(@pt));
+----------------------+
| X(GeomFromText(@pt)) |
+----------------------+
|                 56.7 |
+----------------------+
`http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#point-property-functions§"0  
FOUND_ROWS áSyntax:
FOUND_ROWS()

A SELECT statement may include a LIMIT clause to restrict the number of
rows the server returns to the client. In some cases, it is desirable
to know how many rows the statement would have returned without the
LIMIT, but without running the statement again. To obtain this row
count, include a SQL_CALC_FOUND_ROWS option in the SELECT statement,
and then invoke FOUND_ROWS() afterward:

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

n mysql> SELECT SQL_CALC_FOUND_ROWS * FROM tbl_name
    -> WHERE id > 100 LIMIT 10;
mysql> SELECT FOUND_ROWS();
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html  Ţ21  SYSTEM_USER ‡ Syntax:
SYSTEM_USER()

SYSTEM_USER() is a synonym for USER().

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html  ů22  CROSSES Crosses(g1,g2)

Returns 1 if g1 spatially crosses g2. Returns NULL if g1 is a Polygon
or a MultiPolygon, or if g2 is a Point or a MultiPoint. Otherwise,
returns 0.

The term spatially crosses denotes a spatial relation between two given
geometries that has the following properties:

o The two geometries intersect

o Their intersection results in a geometry that has a dimension that is
  one less than the maximum dimension of the two given geometries

o Their intersection is not equal to either of the two given geometries

URL: http://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html

hhttp://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.htmlî23  TRUNCATE TABLE ˇSyntax:
TRUNCATE [TABLE] tbl_name

TRUNCATE TABLE empties a table completely. Logically, this is
equivalent to a DELETE statement that deletes all rows, but there are
practical differences under some circumstances.

For an InnoDB table before version 5.0.3, InnoDB processes TRUNCATE
TABLE by deleting rows one by one. As of MySQL 5.0.3, row by row
deletion is used only if there are any FOREIGN KEY constraints that
reference the table. If there are no FOREIGN KEY constraints, InnoDB
performs fast truncation by dropping the original table and creating an
empty one with the same definition, which is much faster than deleting
rows one by one. (When fast truncation is used, it resets any
AUTO_INCREMENT counter. From MySQL 5.0.13 on, the AUTO_INCREMENT
counter is reset by TRUNCATE TABLE, regardless of whether there is a
foreign key constraint.)

In the case that FOREIGN KEY constraints reference the table, InnoDB
deletes rows one by one and processes the constraints on each one. If
the FOREIGN KEY constraint specifies DELETE CASCADE, rows from the
child (referenced) table are deleted, and the truncated table becomes
empty. If the FOREIGN KEY constraint does not specify CASCADE, the
TRUNCATE statement deletes rows one by one and stops if it encounters a
parent row that is referenced by the child, returning this error:

ERROR 1451 (23000): Cannot delete or update a parent row: a foreign
key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1`
FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))

This is the same as a DELETE statement with no WHERE clause.

The count of rows affected by TRUNCATE TABLE is accurate only when it
is mapped to a DELETE statement.

For other storage engines, TRUNCATE TABLE differs from DELETE in the
following ways in MySQL 5.0:

o Truncate operations drop and re-create the table, which is much
  faster than deleting rows one by one, particularly for large tables.

o As of MySQL 5.0.8, truncate operations cause an implicit commit.
  Before 5.0.8, truncate operations are not transaction-safe; an error
  occurs when attempting one in the course of an active transaction.

o Truncation operations cannot be performed if the session holds an
  active table lock.

o Truncation operations do not return a meaningful value for the number
  of deleted rows. The usual result is "0 rows affected," which should
  be interpreted as "no information."

o As long as the table format file tbl_name.frm is valid, the table can
  be re-created as an empty table with TRUNCATE TABLE, even if the data
  or index files have become corrupted.

o The table handler does not remember the last used AUTO_INCREMENT
  value, but starts counting from the beginning. This is true even for
  MyISAM and InnoDB, which normally do not reuse sequence values.

o Since truncation of a table does not make any use of DELETE, the
  TRUNCATE statement does not invoke ON DELETE triggers.

URL: http://dev.mysql.com/doc/refman/5.0/en/truncate.html

4http://dev.mysql.com/doc/refman/5.0/en/truncate.html  24  BIT_XOR Ç Syntax:
BIT_XOR(expr)

Returns the bitwise XOR of all bits in expr. The calculation is
performed with 64-bit (BIGINT) precision.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html 25  CURRENT_DATE ­ Syntax:
CURRENT_DATE, CURRENT_DATE()

CURRENT_DATE and CURRENT_DATE() are synonyms for CURDATE().

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html Ś 26  START SLAVE ?Syntax:
START SLAVE [thread_type [, thread_type] ... ]
START SLAVE [SQL_THREAD] UNTIL
    MASTER_LOG_FILE = 'log_name', MASTER_LOG_POS = log_pos
START SLAVE [SQL_THREAD] UNTIL
    RELAY_LOG_FILE = 'log_name', RELAY_LOG_POS = log_pos

thread_type: IO_THREAD | SQL_THREAD

START SLAVE with no thread_type options starts both of the slave
threads. The I/O thread reads queries from the master server and stores
them in the relay log. The SQL thread reads the relay log and executes
the queries. START SLAVE requires the SUPER privilege.

If START SLAVE succeeds in starting the slave threads, it returns
without any error. However, even in that case, it might be that the
slave threads start and then later stop (for example, because they do
not manage to connect to the master or read its binary logs, or some
other problem). START SLAVE does not warn you about this. You must
check the slave's error log for error messages generated by the slave
threads, or check that they are running satisfactorily with SHOW SLAVE
STATUS.

URL: http://dev.mysql.com/doc/refman/5.0/en/start-slave.html

7http://dev.mysql.com/doc/refman/5.0/en/start-slave.htmla"7  AREA ě Area(poly)

Returns as a double-precision number the area of the Polygon value
poly, as measured in its spatial reference system.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#polygon-property-functions

mysql> SET @poly = 'Polygon((0 0,0 3,3 0,0 0),(1 1,1 2,2 1,1 1))';
mysql> SELECT Area(GeomFromText(@poly));
+---------------------------+
| Area(GeomFromText(@poly)) |
+---------------------------+
|                         4 |
+---------------------------+
bhttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#polygon-property-functionsz28  	BEGIN END 1Syntax:
[begin_label:] BEGIN
    [statement_list]
END [end_label]

BEGIN ... END syntax is used for writing compound statements, which can
appear within stored programs. A compound statement can contain
multiple statements, enclosed by the BEGIN and END keywords.
statement_list represents a list of one or more statements, each
terminated by a semicolon (;) statement delimiter. statement_list is
optional, which means that the empty compound statement (BEGIN END) is
legal.

Use of multiple statements requires that a client is able to send
statement strings containing the ; statement delimiter. This is handled
in the mysql command-line client with the delimiter command. Changing
the ; end-of-statement delimiter (for example, to //) allows ; to be
used in a program body. For an example, see
http://dev.mysql.com/doc/refman/5.0/en/stored-programs-defining.html.

A compound statement can be labeled. end_label cannot be given unless
begin_label also is present. If both are present, they must be the
same.

URL: http://dev.mysql.com/doc/refman/5.0/en/begin-end.html

5http://dev.mysql.com/doc/refman/5.0/en/begin-end.html  ‹29  FLUSH JSyntax:
FLUSH [NO_WRITE_TO_BINLOG | LOCAL]
    flush_option [, flush_option] ...

The FLUSH statement clears or reloads various internal caches used by
MySQL. To execute FLUSH, you must have the RELOAD privilege.

The RESET statement is similar to FLUSH. See [HELP RESET].

URL: http://dev.mysql.com/doc/refman/5.0/en/flush.html

1http://dev.mysql.com/doc/refman/5.0/en/flush.html K":  SHOW PROCEDURE STATUS ±Syntax:
SHOW PROCEDURE STATUS
    [LIKE 'pattern' | WHERE expr]

This statement is a MySQL extension. It returns characteristics of a
stored procedure, such as the database, name, type, creator, creation
and modification dates, and character set information. A similar
statement, SHOW FUNCTION STATUS, displays information about stored
functions (see [HELP SHOW FUNCTION STATUS]).

The LIKE clause, if present, indicates which procedure or function
names to match. The WHERE clause can be given to select rows using more
general conditions, as discussed in
http://dev.mysql.com/doc/refman/5.0/en/extended-show.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-procedure-status.html

7mysql> SHOW PROCEDURE STATUS LIKE 'sp1'\G
*************************** 1. row ***************************
           Db: test
         Name: sp1
         Type: PROCEDURE
      Definer: testuser@localhost
     Modified: 2004-08-03 15:29:37
      Created: 2004-08-03 15:29:37
Security_type: DEFINER
      Comment:
Ahttp://dev.mysql.com/doc/refman/5.0/en/show-procedure-status.html ·2;  SHOW WARNINGS fSyntax:
SHOW WARNINGS [LIMIT [offset,] row_count]
SHOW COUNT(*) WARNINGS

SHOW WARNINGS shows the error, warning, and note messages that resulted
from the last statement that generated messages in the current session.
It shows nothing if the last statement used a table and generated no
messages. (That is, a statement that uses a table but generates no
messages clears the message list.) Statements that do not use tables
and do not generate messages have no effect on the message list.

Warnings are generated for DML statements such as INSERT, UPDATE, and
LOAD DATA INFILE as well as DDL statements such as CREATE TABLE and
ALTER TABLE.

A related statement, SHOW ERRORS, shows only the errors. See [HELP SHOW
ERRORS].

The SHOW COUNT(*) WARNINGS statement displays the total number of
errors, warnings, and notes. You can also retrieve this number from the
warning_count variable:

SHOW COUNT(*) WARNINGS;
SELECT @@warning_count;

The value of warning_count might be greater than the number of messages
displayed by SHOW WARNINGS if the max_error_count system variable is
set so low that not all messages are stored. An example shown later in
this section demonstrates how this can happen.

The LIMIT clause has the same syntax as for the SELECT statement. See
http://dev.mysql.com/doc/refman/5.0/en/select.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-warnings.html

9http://dev.mysql.com/doc/refman/5.0/en/show-warnings.html 2<  DESCRIBE <Syntax:
{DESCRIBE | DESC} tbl_name [col_name | wild]

DESCRIBE provides information about the columns in a table. It is a
shortcut for SHOW COLUMNS FROM. As of MySQL 5.0.1, these statements
also display information for views. (See [HELP SHOW COLUMNS].)

col_name can be a column name, or a string containing the SQL "%" and
"_" wildcard characters to obtain output only for the columns with
names matching the string. There is no need to enclose the string
within quotes unless it contains spaces or other special characters.

mysql> DESCRIBE City;
+------------+----------+------+-----+---------+----------------+
| Field      | Type     | Null | Key | Default | Extra          |
+------------+----------+------+-----+---------+----------------+
| Id         | int(11)  | NO   | PRI | NULL    | auto_increment |
| Name       | char(35) | NO   |     |         |                |
| Country    | char(3)  | NO   | UNI |         |                |
| District   | char(20) | YES  | MUL |         |                |
| Population | int(11)  | NO   |     | 0       |                |
+------------+----------+------+-----+---------+----------------+
5 rows in set (0.00 sec)

The description for SHOW COLUMNS provides more information about the
output columns (see [HELP SHOW COLUMNS]).

URL: http://dev.mysql.com/doc/refman/5.0/en/describe.html

4http://dev.mysql.com/doc/refman/5.0/en/describe.html  2=  	DROP USER »Syntax:
DROP USER user [, user] ...

The DROP USER statement removes one or more MySQL accounts. To use it,
you must have the global CREATE USER privilege or the DELETE privilege
for the mysql database. Each account is named using the same format as
for the GRANT statement; for example, 'jeffrey'@'localhost'. If you
specify only the user name part of the account name, a host name part
of '%' is used. For additional information about specifying account
names, see [HELP GRANT].

DROP USER as present in MySQL 5.0.0 removes only accounts that have no
privileges. In MySQL 5.0.2, it was modified to remove account
privileges as well. This means that the procedure for removing an
account depends on your version of MySQL.

As of MySQL 5.0.2, you can remove an account and its privileges as
follows:

DROP USER user;

The statement removes privilege rows for the account from all grant
tables.

URL: http://dev.mysql.com/doc/refman/5.0/en/drop-user.html

5http://dev.mysql.com/doc/refman/5.0/en/drop-user.htmlŔ 2>  
STDDEV_POP mSyntax:
STDDEV_POP(expr)

Returns the population standard deviation of expr (the square root of
VAR_POP()). This function was added in MySQL 5.0.3. Before 5.0.3, you
can use STD() or STDDEV(), which are equivalent but not standard SQL.

STDDEV_POP() returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.htmlu2?  SHOW CHARACTER SET Syntax:
SHOW CHARACTER SET
    [LIKE 'pattern' | WHERE expr]

The SHOW CHARACTER SET statement shows all available character sets.
The LIKE clause, if present, indicates which character set names to
match. The WHERE clause can be given to select rows using more general
conditions, as discussed in
http://dev.mysql.com/doc/refman/5.0/en/extended-show.html. For example:

mysql> SHOW CHARACTER SET LIKE 'latin%';
+---------+-----------------------------+-------------------+--------+
| Charset | Description                 | Default collation | Maxlen |
+---------+-----------------------------+-------------------+--------+
| latin1  | cp1252 West European        | latin1_swedish_ci |      1 |
| latin2  | ISO 8859-2 Central European | latin2_general_ci |      1 |
| latin5  | ISO 8859-9 Turkish          | latin5_turkish_ci |      1 |
| latin7  | ISO 8859-13 Baltic          | latin7_general_ci |      1 |
+---------+-----------------------------+-------------------+--------+

URL: http://dev.mysql.com/doc/refman/5.0/en/show-character-set.html

>http://dev.mysql.com/doc/refman/5.0/en/show-character-set.html"@  	SUBSTRING" 6Syntax:
SUBSTRING(str,pos), SUBSTRING(str FROM pos), SUBSTRING(str,pos,len),
SUBSTRING(str FROM pos FOR len)

The forms without a len argument return a substring from string str
starting at position pos. The forms with a len argument return a
substring len characters long from string str, starting at position
pos. The forms that use FROM are standard SQL syntax. It is also
possible to use a negative value for pos. In this case, the beginning
of the substring is pos characters from the end of the string, rather
than the beginning. A negative value may be used for pos in any of the
forms of this function.

For all forms of SUBSTRING(), the position of the first character in
the string from which the substring is to be extracted is reckoned as
1.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

zmysql> SELECT SUBSTRING('Quadratically',5);
        -> 'ratically'
mysql> SELECT SUBSTRING('foobarbar' FROM 4);
        -> 'barbar'
mysql> SELECT SUBSTRING('Quadratically',5,6);
        -> 'ratica'
mysql> SELECT SUBSTRING('Sakila', -3);
        -> 'ila'
mysql> SELECT SUBSTRING('Sakila', -5, 3);
        -> 'aki'
mysql> SELECT SUBSTRING('Sakila' FROM -4 FOR 2);
        -> 'ki'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  ¨ 2A  ISEMPTY! +IsEmpty(g)

Returns 1 if the geometry value g is the empty geometry, 0 if it is not
empty, and -1 if the argument is NULL. If the geometry is empty, it
represents the empty point set.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions

khttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functionsV2B  SHOW FUNCTION STATUS ÷ Syntax:
SHOW FUNCTION STATUS
    [LIKE 'pattern' | WHERE expr]

This statement is similar to SHOW PROCEDURE STATUS but for stored
functions. See [HELP SHOW PROCEDURE STATUS].

URL: http://dev.mysql.com/doc/refman/5.0/en/show-function-status.html

@http://dev.mysql.com/doc/refman/5.0/en/show-function-status.html  "C  LTRIM" – Syntax:
LTRIM(str)

Returns the string str with leading space characters removed.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

5 mysql> SELECT LTRIM('  barbar');
        -> 'barbar'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html?2D  
INTERSECTS Â Intersects(g1,g2)

Returns 1 or 0 to indicate whether g1 spatially intersects g2.

URL: http://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html

hhttp://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html 2E  CALL ÂSyntax:
CALL sp_name([parameter[,...]])
CALL sp_name[()]

The CALL statement invokes a stored procedure that was defined
previously with CREATE PROCEDURE.

As of MySQL 5.0.30, stored procedures that take no arguments can be
invoked without parentheses. That is, CALL p() and CALL p are
equivalent.

CALL can pass back values to its caller using parameters that are
declared as OUT or INOUT parameters. When the procedure returns, a
client program can also obtain the number of rows affected for the
final statement executed within the routine: At the SQL level, call the
ROW_COUNT() function; from the C API, call the mysql_affected_rows()
function.

URL: http://dev.mysql.com/doc/refman/5.0/en/call.html

0http://dev.mysql.com/doc/refman/5.0/en/call.html@ 2F  MBRDISJOINT ĺ MBRDisjoint(g1,g2)

Returns 1 or 0 to indicate whether the Minimum Bounding Rectangles of
the two geometries g1 and g2 are disjoint (do not intersect).

URL: http://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.html

Ehttp://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.htmli"G  VALUES ĄSyntax:
VALUES(col_name)

In an INSERT ... ON DUPLICATE KEY UPDATE statement, you can use the
VALUES(col_name) function in the UPDATE clause to refer to column
values from the INSERT portion of the statement. In other words,
VALUES(col_name) in the UPDATE clause refers to the value of col_name
that would be inserted, had no duplicate-key conflict occurred. This
function is especially useful in multiple-row inserts. The VALUES()
function is meaningful only in INSERT ... ON DUPLICATE KEY UPDATE
statements and returns NULL otherwise.
http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

n mysql> INSERT INTO table (a,b,c) VALUES (1,2,3),(4,5,6)
    -> ON DUPLICATE KEY UPDATE c=VALUES(a)+VALUES(b);
Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.htmlŢ"H  SUBSTRING_INDEX" çSyntax:
SUBSTRING_INDEX(str,delim,count)

Returns the substring from string str before count occurrences of the
delimiter delim. If count is positive, everything to the left of the
final delimiter (counting from the left) is returned. If count is
negative, everything to the right of the final delimiter (counting from
the right) is returned. SUBSTRING_INDEX() performs a case-sensitive
match when searching for delim.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

ź mysql> SELECT SUBSTRING_INDEX('www.mysql.com', '.', 2);
        -> 'www.mysql'
mysql> SELECT SUBSTRING_INDEX('www.mysql.com', '.', -2);
        -> 'mysql.com'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  µ2I  ENCODE
 dSyntax:
ENCODE(str,pass_str)

Encrypt str using pass_str as the password. To decrypt the result, use
DECODE().

The result is a binary string of the same length as str.

The strength of the encryption is based on how good the random
generator is. It should suffice for short strings.

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html•2J  LOOP LSyntax:
[begin_label:] LOOP
    statement_list
END LOOP [end_label]

LOOP implements a simple loop construct, enabling repeated execution of
the statement list, which consists of one or more statements, each
terminated by a semicolon (;) statement delimiter. The statements
within the loop are repeated until the loop is exited; usually this is
accomplished with a LEAVE statement.

A LOOP statement can be labeled. end_label cannot be given unless
begin_label also is present. If both are present, they must be the
same.

URL: http://dev.mysql.com/doc/refman/5.0/en/loop-statement.html

:http://dev.mysql.com/doc/refman/5.0/en/loop-statement.html«"K  TRUNCATE 2Syntax:
TRUNCATE(X,D)

Returns the number X, truncated to D decimal places. If D is 0, the
result has no decimal point or fractional part. D can be negative to
cause D digits left of the decimal point of the value X to become zero.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

"mysql> SELECT TRUNCATE(1.223,1);
        -> 1.2
mysql> SELECT TRUNCATE(1.999,1);
        -> 1.9
mysql> SELECT TRUNCATE(1.999,0);
        -> 1
mysql> SELECT TRUNCATE(-1.999,1);
        -> -1.9
mysql> SELECT TRUNCATE(122,-2);
       -> 100
mysql> SELECT TRUNCATE(10.28*100,0);
       -> 1028
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html ˇ"L  TIMESTAMPADD ¨Syntax:
TIMESTAMPADD(unit,interval,datetime_expr)

Adds the integer expression interval to the date or datetime expression
datetime_expr. The unit for interval is given by the unit argument,
which should be one of the following values: FRAC_SECOND
(microseconds), SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, or
YEAR.

Beginning with MySQL 5.0.60, it is possible to use MICROSECOND in place
of FRAC_SECOND with this function, and FRAC_SECOND is deprecated.

The unit value may be specified using one of keywords as shown, or with
a prefix of SQL_TSI_. For example, DAY and SQL_TSI_DAY both are legal.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

ť mysql> SELECT TIMESTAMPADD(MINUTE,1,'2003-01-02');
        -> '2003-01-02 00:01:00'
mysql> SELECT TIMESTAMPADD(WEEK,1,'2003-01-02');
        -> '2003-01-09'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html 2M  SHOW ŃSHOW has many forms that provide information about databases, tables,
columns, or status information about the server. This section describes
those following:

SHOW CHARACTER SET [like_or_where]
SHOW COLLATION [like_or_where]
SHOW [FULL] COLUMNS FROM tbl_name [FROM db_name] [like_or_where]
SHOW CREATE DATABASE db_name
SHOW CREATE FUNCTION func_name
SHOW CREATE PROCEDURE proc_name
SHOW CREATE TABLE tbl_name
SHOW DATABASES [like_or_where]
SHOW ENGINE engine_name {LOGS | STATUS }
SHOW [STORAGE] ENGINES
SHOW ERRORS [LIMIT [offset,] row_count]
SHOW FUNCTION CODE func_name
SHOW FUNCTION STATUS [like_or_where]
SHOW GRANTS FOR user
SHOW INDEX FROM tbl_name [FROM db_name]
SHOW INNODB STATUS
SHOW PROCEDURE CODE proc_name
SHOW PROCEDURE STATUS [like_or_where]
SHOW [BDB] LOGS
SHOW MUTEX STATUS
SHOW OPEN TABLES [FROM db_name] [like_or_where]
SHOW PRIVILEGES
SHOW [FULL] PROCESSLIST
SHOW PROFILE [types] [FOR QUERY n] [OFFSET n] [LIMIT n]
SHOW PROFILES
SHOW [GLOBAL | SESSION] STATUS [like_or_where]
SHOW TABLE STATUS [FROM db_name] [like_or_where]
SHOW TABLES [FROM db_name] [like_or_where]
SHOW TRIGGERS [FROM db_name] [like_or_where]
SHOW [GLOBAL | SESSION] VARIABLES [like_or_where]
SHOW WARNINGS [LIMIT [offset,] row_count]

like_or_where:
    LIKE 'pattern'
  | WHERE expr

If the syntax for a given SHOW statement includes a LIKE 'pattern'
part, 'pattern' is a string that can contain the SQL "%" and "_"
wildcard characters. The pattern is useful for restricting statement
output to matching values.

Several SHOW statements also accept a WHERE clause that provides more
flexibility in specifying which rows to display. See
http://dev.mysql.com/doc/refman/5.0/en/extended-show.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/show.html

0http://dev.mysql.com/doc/refman/5.0/en/show.htmlč "N  GREATEST ř Syntax:
GREATEST(value1,value2,...)

With two or more arguments, returns the largest (maximum-valued)
argument. The arguments are compared using the same rules as for
LEAST().

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

› mysql> SELECT GREATEST(2,0);
        -> 2
mysql> SELECT GREATEST(34.0,3.0,5.0,767.0);
        -> 767.0
mysql> SELECT GREATEST('B','A','C');
        -> 'C'
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.htmlp 2O  SHOW VARIABLES Syntax:
SHOW [GLOBAL | SESSION] VARIABLES
    [LIKE 'pattern' | WHERE expr]

SHOW VARIABLES shows the values of MySQL system variables. This
information also can be obtained using the mysqladmin variables
command. The LIKE clause, if present, indicates which variable names to
match. The WHERE clause can be given to select rows using more general
conditions, as discussed in
http://dev.mysql.com/doc/refman/5.0/en/extended-show.html. This
statement does not require any privilege. It requires only the ability
to connect to the server.

With the GLOBAL modifier, SHOW VARIABLES displays the values that are
used for new connections to MySQL. With SESSION, it displays the values
that are in effect for the current connection. If no modifier is
present, the default is SESSION. LOCAL is a synonym for SESSION.
With a LIKE clause, the statement displays only rows for those
variables with names that match the pattern. To obtain the row for a
specific variable, use a LIKE clause as shown:

SHOW VARIABLES LIKE 'max_join_size';
SHOW SESSION VARIABLES LIKE 'max_join_size';

To get a list of variables whose name match a pattern, use the "%"
wildcard character in a LIKE clause:

SHOW VARIABLES LIKE '%size%';
SHOW GLOBAL VARIABLES LIKE '%size%';

Wildcard characters can be used in any position within the pattern to
be matched. Strictly speaking, because "_" is a wildcard that matches
any single character, you should escape it as "\_" to match it
literally. In practice, this is rarely necessary.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-variables.html

:http://dev.mysql.com/doc/refman/5.0/en/show-variables.html2P  BIT_AND Ç Syntax:
BIT_AND(expr)

Returns the bitwise AND of all bits in expr. The calculation is
performed with 64-bit (BIGINT) precision.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html "Q  SECOND ” Syntax:
SECOND(time)

Returns the second for time, in the range 0 to 59.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

/ mysql> SELECT SECOND('10:05:03');
        -> 3
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmló"R  ATAN2 0Syntax:
ATAN(Y,X), ATAN2(Y,X)

Returns the arc tangent of the two variables X and Y. It is similar to
calculating the arc tangent of Y / X, except that the signs of both
arguments are used to determine the quadrant of the result.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

o mysql> SELECT ATAN(-2,2);
        -> -0.78539816339745
mysql> SELECT ATAN2(PI(),0);
        -> 1.5707963267949
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html "S  MBRCONTAINS MBRContains(g1,g2)

Returns 1 or 0 to indicate whether the Minimum Bounding Rectangle of g1
contains the Minimum Bounding Rectangle of g2. This tests the opposite
relationship as MBRWithin().

URL: http://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.html

—mysql> SET @g1 = GeomFromText('Polygon((0 0,0 3,3 3,3 0,0 0))');
mysql> SET @g2 = GeomFromText('Point(1 1)');
mysql> SELECT MBRContains(@g1,@g2), MBRContains(@g2,@g1);
----------------------+----------------------+
| MBRContains(@g1,@g2) | MBRContains(@g2,@g1) |
+----------------------+----------------------+
|                    1 |                    0 |
+----------------------+----------------------+
Ehttp://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.htmlÓ"T  HOUR !Syntax:
HOUR(time)

Returns the hour for time. The range of the return value is 0 to 23 for
time-of-day values. However, the range of TIME values actually is much
larger, so HOUR can return values greater than 23.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

^ mysql> SELECT HOUR('10:05:03');
        -> 10
mysql> SELECT HOUR('272:59:59');
        -> 272
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html e2U  SELECT "Syntax:
SELECT
    [ALL | DISTINCT | DISTINCTROW ]
      [HIGH_PRIORITY]
      [STRAIGHT_JOIN]
      [SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_BUFFER_RESULT]
      [SQL_CACHE | SQL_NO_CACHE] [SQL_CALC_FOUND_ROWS]
    select_expr [, select_expr ...]
    [FROM table_references
    [WHERE where_condition]
    [GROUP BY {col_name | expr | position}
      [ASC | DESC], ... [WITH ROLLUP]]
    [HAVING where_condition]
    [ORDER BY {col_name | expr | position}
      [ASC | DESC], ...]
    [LIMIT {[offset,] row_count | row_count OFFSET offset}]
    [PROCEDURE procedure_name(argument_list)]
    [INTO OUTFILE 'file_name' export_options
      | INTO DUMPFILE 'file_name'
      | INTO var_name [, var_name]]
    [FOR UPDATE | LOCK IN SHARE MODE]]

SELECT is used to retrieve rows selected from one or more tables, and
can include UNION statements and subqueries. See [HELP UNION], and
http://dev.mysql.com/doc/refman/5.0/en/subqueries.html.

The most commonly used clauses of SELECT statements are these:

o Each select_expr indicates a column that you want to retrieve. There
  must be at least one select_expr.

o table_references indicates the table or tables from which to retrieve
  rows. Its syntax is described in [HELP JOIN].

o The WHERE clause, if given, indicates the condition or conditions
  that rows must satisfy to be selected. where_condition is an
  expression that evaluates to true for each row to be selected. The
  statement selects all rows if there is no WHERE clause.

  In the WHERE clause, you can use any of the functions and operators
  that MySQL supports, except for aggregate (summary) functions. See
  http://dev.mysql.com/doc/refman/5.0/en/functions.html.

SELECT can also be used to retrieve rows computed without reference to
any table.

URL: http://dev.mysql.com/doc/refman/5.0/en/select.html

2http://dev.mysql.com/doc/refman/5.0/en/select.html!"V  COT v Syntax:
COT(X)

Returns the cotangent of X.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

Y mysql> SELECT COT(12);
        -> -1.5726734063977
mysql> SELECT COT(0);
        -> NULL
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html/2W  BACKUP TABLE ŕSyntax:
BACKUP TABLE tbl_name [, tbl_name] ... TO '/path/to/backup/directory'

*Note*: This statement is deprecated. We are working on a better
replacement for it that will provide online backup capabilities. In the
meantime, the mysqlhotcopy script can be used instead.

BACKUP TABLE copies to the backup directory the minimum number of table
files needed to restore the table, after flushing any buffered changes
to disk. The statement works only for MyISAM tables. It copies the .frm
definition and .MYD data files. The .MYI index file can be rebuilt from
those two files. The directory should be specified as a full path name.
To restore the table, use RESTORE TABLE.

URL: http://dev.mysql.com/doc/refman/5.0/en/backup-table.html

8http://dev.mysql.com/doc/refman/5.0/en/backup-table.html É"X  	LOAD_FILE" Syntax:
LOAD_FILE(file_name)

Reads the file and returns the file contents as a string. To use this
function, the file must be located on the server host, you must specify
the full path name to the file, and you must have the FILE privilege.
The file must be readable by all and its size less than
max_allowed_packet bytes. If the secure_file_priv system variable is
set to a nonempty directory name, the file to be loaded must be located
in that directory.

If the file does not exist or cannot be read because one of the
preceding conditions is not satisfied, the function returns NULL.

As of MySQL 5.0.19, the character_set_filesystem system variable
controls interpretation of file names that are given as literal
strings.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

[ mysql> UPDATE t
            SET blob_col=LOAD_FILE('/tmp/picture')
            WHERE id=1;
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html2Y  LOAD TABLE FROM MASTER źSyntax:
LOAD TABLE tbl_name FROM MASTER

This feature is deprecated and should be avoided. It is subject to
removal in a future version of MySQL.

Since the current implementation of LOAD DATA FROM MASTER and LOAD
TABLE FROM MASTER is very limited, these statements are deprecated in
versions 4.1 of MySQL and above. We will introduce a more advanced
technique (called "online backup") in a future version. That technique
will have the additional advantage of working with more storage
engines.

For MySQL 5.1 and earlier, the recommended alternative solution to
using LOAD DATA FROM MASTER or LOAD TABLE FROM MASTER is using
mysqldump or mysqlhotcopy. The latter requires Perl and two Perl
modules (DBI and DBD:mysql) and works for MyISAM and ARCHIVE tables
only. With mysqldump, you can create SQL dumps on the master and pipe
(or copy) these to a mysql client on the slave. This has the advantage
of working for all storage engines, but can be quite slow, since it
works using SELECT.

Transfers a copy of the table from the master to the slave. This
statement is implemented mainly debugging LOAD DATA FROM MASTER
operations. To use LOAD TABLE, the account used for connecting to the
master server must have the RELOAD and SUPER privileges on the master
and the SELECT privilege for the master table to load. On the slave
side, the user that issues LOAD TABLE FROM MASTER must have privileges
for dropping and creating the table.

The conditions for LOAD DATA FROM MASTER apply here as well. For
example, LOAD TABLE FROM MASTER works only for MyISAM tables. The
timeout notes for LOAD DATA FROM MASTER apply as well.

URL: http://dev.mysql.com/doc/refman/5.0/en/load-table-from-master.html

Bhttp://dev.mysql.com/doc/refman/5.0/en/load-table-from-master.html  %2Z  POINTFROMTEXT ¸ PointFromText(wkt[,srid])

Constructs a POINT value using its WKT representation and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions” "[  GROUP_CONCAT ĂSyntax:
GROUP_CONCAT(expr)

This function returns a string result with the concatenated non-NULL
values from a group. It returns NULL if there are no non-NULL values.
The full syntax is as follows:

GROUP_CONCAT([DISTINCT] expr [,expr ...]
             [ORDER BY {unsigned_integer | col_name | expr}
                 [ASC | DESC] [,col_name ...]]
             [SEPARATOR str_val])

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

z mysql> SELECT student_name,
    ->     GROUP_CONCAT(test_score)
    ->     FROM student
    ->     GROUP BY student_name;
>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.htmlP "\  DATE_FORMAT ¤ Syntax:
DATE_FORMAT(date,format)

Formats the date value according to the format string.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Qmysql> SELECT DATE_FORMAT('2009-10-04 22:23:00', '%W %M %Y');
        -> 'Sunday October 2009'
mysql> SELECT DATE_FORMAT('2007-10-04 22:23:00', '%H:%i:%s');
        -> '22:23:00'
mysql> SELECT DATE_FORMAT('1900-10-04 22:23:00',
    ->                 '%D %y %a %d %m %b %j');
        -> '4th 00 Thu 04 10 Oct 277'
mysql> SELECT DATE_FORMAT('1997-10-04 22:23:00',
    ->                 '%H %k %I %r %T %S %w');
        -> '22 22 10 10:23:00 PM 22:23:00 00 6'
mysql> SELECT DATE_FORMAT('1999-01-01', '%X %V');
        -> '1998 52'
mysql> SELECT DATE_FORMAT('2006-06-00', '%d');
        -> '00'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html"]  	BENCHMARK nSyntax:
BENCHMARK(count,expr)

The BENCHMARK() function executes the expression expr repeatedly count
times. It may be used to time how quickly MySQL processes the
expression. The result value is always 0. The intended use is from
within the mysql client, which reports query execution times:

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

Imysql> SELECT BENCHMARK(1000000,ENCODE('hello','goodbye'));
+----------------------------------------------+
| BENCHMARK(1000000,ENCODE('hello','goodbye')) |
+----------------------------------------------+
|                                            0 |
+----------------------------------------------+
1 row in set (4.74 sec)
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html  5"^  YEAR Ż Syntax:
YEAR(date)

Returns the year for date, in the range 1000 to 9999, or 0 for the
"zero" date.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

2 mysql> SELECT YEAR('1987-01-01');
        -> 1987
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlś 2_  SHOW ENGINE OSyntax:
SHOW ENGINE engine_name {LOGS | STATUS }

SHOW ENGINE displays log or status information about a storage engine.
The following statements currently are supported:

SHOW ENGINE BDB LOGS
SHOW ENGINE INNODB STATUS
SHOW ENGINE NDB STATUS
SHOW ENGINE NDBCLUSTER STATUS

URL: http://dev.mysql.com/doc/refman/5.0/en/show-engine.html

7http://dev.mysql.com/doc/refman/5.0/en/show-engine.htmlŔ 2`  
NAME_CONST hSyntax:
NAME_CONST(name,value)

Returns the given value. When used to produce a result set column,
NAME_CONST() causes the column to have the given name. The arguments
should be constants.

mysql> SELECT NAME_CONST('myname', 14);
+--------+
| myname |
+--------+
|     14 |
+--------+

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.htmlq2a  RELEASE_LOCK Syntax:
RELEASE_LOCK(str)

Releases the lock named by the string str that was obtained with
GET_LOCK(). Returns 1 if the lock was released, 0 if the lock was not
established by this thread (in which case the lock is not released),
and NULL if the named lock did not exist. The lock does not exist if it
was never obtained by a call to GET_LOCK() or if it has previously been
released.

The DO statement is convenient to use with RELEASE_LOCK(). See [HELP
DO].

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html"b  IS NULL x Syntax:
IS NULL

Tests whether a value is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

E mysql> SELECT 1 IS NULL, 0 IS NULL, NULL IS NULL;
        -> 0, 0, 1
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html˝"c  
CONVERT_TZ ˇSyntax:
CONVERT_TZ(dt,from_tz,to_tz)

CONVERT_TZ() converts a datetime value dt from the time zone given by
from_tz to the time zone given by to_tz and returns the resulting
value. Time zones are specified as described in
http://dev.mysql.com/doc/refman/5.0/en/time-zone-support.html. This
function returns NULL if the arguments are invalid.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Â mysql> SELECT CONVERT_TZ('2004-01-01 12:00:00','GMT','MET');
        -> '2004-01-01 13:00:00'
mysql> SELECT CONVERT_TZ('2004-01-01 12:00:00','+00:00','+10:00');
        -> '2004-01-01 22:00:00'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmla"d  TIME_TO_SEC — Syntax:
TIME_TO_SEC(time)

Returns the time argument, converted to seconds.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

o mysql> SELECT TIME_TO_SEC('22:23:00');
        -> 80580
mysql> SELECT TIME_TO_SEC('00:39:38');
        -> 2378
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlt "e  WEEKDAY ° Syntax:
WEEKDAY(date)

Returns the weekday index for date (0 = Monday, 1 = Tuesday, ... 6 =
Sunday).

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

m mysql> SELECT WEEKDAY('2008-02-03 22:23:00');
        -> 6
mysql> SELECT WEEKDAY('2007-11-06');
        -> 1
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html "f  
EXPORT_SET" 4Syntax:
EXPORT_SET(bits,on,off[,separator[,number_of_bits]])

Returns a string such that for every bit set in the value bits, you get
an on string and for every bit not set in the value, you get an off
string. Bits in bits are examined from right to left (from low-order to
high-order bits). Strings are added to the result from left to right,
separated by the separator string (the default being the comma
character ","). The number of bits examined is given by number_of_bits
(defaults to 64).

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

Ť mysql> SELECT EXPORT_SET(5,'Y','N',',',4);
        -> 'Y,N,Y,N'
mysql> SELECT EXPORT_SET(6,'1','0',',',10);
        -> '0,1,1,0,0,0,0,0,0,0'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html§"g  TIME FUNCTION ş Syntax:
TIME(expr)

Extracts the time part of the time or datetime expression expr and
returns it as a string.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

 mysql> SELECT TIME('2003-12-31 01:02:03');
        -> '01:02:03'
mysql> SELECT TIME('2003-12-31 01:02:03.000123');
        -> '01:02:03.000123'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html ®"h  DATE_ADD Syntax:
DATE_ADD(date,INTERVAL expr unit), DATE_SUB(date,INTERVAL expr unit)

These functions perform date arithmetic. The date argument specifies
the starting date or datetime value. expr is an expression specifying
the interval value to be added or subtracted from the starting date.
expr is a string; it may start with a "-" for negative intervals. unit
is a keyword indicating the units in which the expression should be
interpreted.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Umysql> SELECT '2008-12-31 23:59:59' + INTERVAL 1 SECOND;
        -> '2009-01-01 00:00:00'
mysql> SELECT INTERVAL 1 DAY + '2008-12-31';
        -> '2009-01-01'
mysql> SELECT '2005-01-01' - INTERVAL 1 SECOND;
        -> '2004-12-31 23:59:59'
mysql> SELECT DATE_ADD('2000-12-31 23:59:59',
    ->                 INTERVAL 1 SECOND);
        -> '2001-01-01 00:00:00'
mysql> SELECT DATE_ADD('2010-12-31 23:59:59',
    ->                 INTERVAL 1 DAY);
        -> '2011-01-01 23:59:59'
mysql> SELECT DATE_ADD('2100-12-31 23:59:59',
    ->                 INTERVAL '1:1' MINUTE_SECOND);
        -> '2101-01-01 00:01:00'
mysql> SELECT DATE_SUB('2005-01-01 00:00:00',
    ->                 INTERVAL '1 1:1:1' DAY_SECOND);
        -> '2004-12-30 22:58:59'
mysql> SELECT DATE_ADD('1900-01-01 00:00:00',
    ->                 INTERVAL '-1 10' DAY_HOUR);
        -> '1899-12-30 14:00:00'
mysql> SELECT DATE_SUB('1998-01-02', INTERVAL 31 DAY);
        -> '1997-12-02'
mysql> SELECT DATE_ADD('1992-12-31 23:59:59.000002',
    ->            INTERVAL '1.999999' SECOND_MICROSECOND);
        -> '1993-01-01 00:00:01.000001'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  G2i  CAST" ţ Syntax:
CAST(expr AS type)

The CAST() function takes a value of one type and produce a value of
another type, similar to CONVERT(). See the description of CONVERT()
for more information.

URL: http://dev.mysql.com/doc/refman/5.0/en/cast-functions.html

:http://dev.mysql.com/doc/refman/5.0/en/cast-functions.html  ě 2j  SOUNDS LIKE" š Syntax:
expr1 SOUNDS LIKE expr2

This is the same as SOUNDEX(expr1) = SOUNDEX(expr2).

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html˘"k  PERIOD_DIFF Syntax:
PERIOD_DIFF(P1,P2)

Returns the number of months between periods P1 and P2. P1 and P2
should be in the format YYMM or YYYYMM. Note that the period arguments
P1 and P2 are not date values.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

8 mysql> SELECT PERIOD_DIFF(200802,200703);
        -> 11
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  A"l  LIKE" „Syntax:
expr LIKE pat [ESCAPE 'escape_char']

Pattern matching using SQL simple regular expression comparison.
Returns 1 (TRUE) or 0 (FALSE). If either expr or pat is NULL, the
result is NULL.

The pattern need not be a literal string. For example, it can be
specified as a string expression or table column.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-comparison-functions.html

e mysql> SELECT 'David!' LIKE 'David_';
        -> 1
mysql> SELECT 'David!' LIKE '%D%v%';
        -> 1
Ghttp://dev.mysql.com/doc/refman/5.0/en/string-comparison-functions.html8 2m  
MULTIPOINT Ă MultiPoint(pt1,pt2,...)

Constructs a MultiPoint value using Point or WKB Point arguments.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions

`http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions č "n  >> } Syntax:
>>

Shifts a longlong (BIGINT) number to the right.

URL: http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html

# mysql> SELECT 4 >> 2;
        -> 1
9http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html( 2o  FETCH çSyntax:
FETCH cursor_name INTO var_name [, var_name] ...

This statement fetches the next row (if a row exists) using the
specified open cursor, and advances the cursor pointer.

If no more rows are available, a No Data condition occurs with SQLSTATE
value 02000. To detect this condition, you can set up a handler for it
(or for a NOT FOUND condition). An example is shown in
http://dev.mysql.com/doc/refman/5.0/en/cursors.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/fetch.html

1http://dev.mysql.com/doc/refman/5.0/en/fetch.htmlÝ"p  AVG #Syntax:
AVG([DISTINCT] expr)

Returns the average value of expr. The DISTINCT option can be used as
of MySQL 5.0.3 to return the average of the distinct values of expr.

AVG() returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

l mysql> SELECT student_name, AVG(test_score)
    ->        FROM student
    ->        GROUP BY student_name;
>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.htmlE2q  
TRUE FALSE ö The constants TRUE and FALSE evaluate to 1 and 0, respectively. The
constant names can be written in any lettercase.

mysql> SELECT TRUE, true, FALSE, false;
        -> 1, 1, 0, 0

URL: http://dev.mysql.com/doc/refman/5.0/en/boolean-values.html

:http://dev.mysql.com/doc/refman/5.0/en/boolean-values.htmlý"r  	MBRWITHIN MBRWithin(g1,g2)

Returns 1 or 0 to indicate whether the Minimum Bounding Rectangle of g1
is within the Minimum Bounding Rectangle of g2. This tests the opposite
relationship as MBRContains().

URL: http://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.html

”mysql> SET @g1 = GeomFromText('Polygon((0 0,0 3,3 3,3 0,0 0))');
mysql> SET @g2 = GeomFromText('Polygon((0 0,0 5,5 5,5 0,0 0))');
mysql> SELECT MBRWithin(@g1,@g2), MBRWithin(@g2,@g1);
+--------------------+--------------------+
| MBRWithin(@g1,@g2) | MBRWithin(@g2,@g1) |
+--------------------+--------------------+
|                  1 |                  0 |
+--------------------+--------------------+
Ehttp://dev.mysql.com/doc/refman/5.0/en/relations-on-geometry-mbr.htmlý"s  IN FSyntax:
expr IN (value,...)

Returns 1 if expr is equal to any of the values in the IN list, else
returns 0. If all values are constants, they are evaluated according to
the type of expr and sorted. The search for the item then is done using
a binary search. This means IN is very quick if the IN value list
consists entirely of constants. Otherwise, type conversion takes place
according to the rules described in
http://dev.mysql.com/doc/refman/5.0/en/type-conversion.html, but
applied to all the arguments.

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

h mysql> SELECT 2 IN (0,3,5,7);
        -> 0
mysql> SELECT 'wefwf' IN ('wee','wefwf','weg');
        -> 1
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.htmlq"t  QUOTE" ĂSyntax:
QUOTE(str)

Quotes a string to produce a result that can be used as a properly
escaped data value in an SQL statement. The string is returned enclosed
by single quotes and with each instance of single quote ("'"),
backslash ("\"), ASCII NUL, and Control-Z preceded by a backslash. If
the argument is NULL, the return value is the word "NULL" without
enclosing single quotes.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

` mysql> SELECT QUOTE('Don\'t!');
        -> 'Don\'t!'
mysql> SELECT QUOTE(NULL);
        -> NULL
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html á2u  SESSION_USER ‰ Syntax:
SESSION_USER()

SESSION_USER() is a synonym for USER().

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html;2v  HELP COMMAND âSyntax:
mysql> help search_string

If you provide an argument to the help command, mysql uses it as a
search string to access server-side help from the contents of the MySQL
Reference Manual. The proper operation of this command requires that
the help tables in the mysql database be initialized with help topic
information (see
http://dev.mysql.com/doc/refman/5.0/en/server-side-help-support.html).

If there is no match for the search string, the search fails:

mysql> help me

Nothing found
Please try to run 'help contents' for a list of all accessible topics

Use help contents to see a list of the help categories:

mysql> help contents
You asked for help about help category: "Contents"
For more information, type 'help <item>', where <item> is one of the
following categories:
   Account Management
   Administration
   Data Definition
   Data Manipulation
   Data Types
   Functions
   Functions and Modifiers for Use with GROUP BY
   Geographic Features
   Language Structure
   Storage Engines
   Stored Routines
   Table Maintenance
   Transactions
   Triggers

If the search string matches multiple items, mysql shows a list of
matching topics:

mysql> help logs
Many help items for your request exist.
To make a more specific request, please type 'help <item>',
where <item> is one of the following topics:
   SHOW
   SHOW BINARY LOGS
   SHOW ENGINE
   SHOW LOGS

Use a topic as the search string to see the help entry for that topic:

mysql> help show binary logs
Name: 'SHOW BINARY LOGS'
Description:
Syntax:
SHOW BINARY LOGS
SHOW MASTER LOGS

Lists the binary log files on the server. This statement is used as
part of the procedure described in [purge-binary-logs], that shows how
to determine which logs can be purged.

mysql> SHOW BINARY LOGS;
+---------------+-----------+
| Log_name      | File_size |
+---------------+-----------+
| binlog.000015 |    724935 |
| binlog.000016 |    733481 |
+---------------+-----------+

URL: http://dev.mysql.com/doc/refman/5.0/en/mysql-server-side-help.html

Bhttp://dev.mysql.com/doc/refman/5.0/en/mysql-server-side-help.html *"w  QUARTER ˇ Syntax:
QUARTER(date)

Returns the quarter of the year for date, in the range 1 to 4.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

2 mysql> SELECT QUARTER('2008-04-01');
        -> 2
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html   ń2x  POSITION" ˘ Syntax:
POSITION(substr IN str)

POSITION(substr IN str) is a synonym for LOCATE(substr,str).

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html>2y  SHOW CREATE FUNCTION ß Syntax:
SHOW CREATE FUNCTION func_name

This statement is similar to SHOW CREATE PROCEDURE but for stored
functions. See [HELP SHOW CREATE PROCEDURE].

URL: http://dev.mysql.com/doc/refman/5.0/en/show-create-function.html

@http://dev.mysql.com/doc/refman/5.0/en/show-create-function.html  j2z  IS_USED_LOCK Syntax:
IS_USED_LOCK(str)

Checks whether the lock named str is in use (that is, locked). If so,
it returns the connection identifier of the client that holds the lock.
Otherwise, it returns NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html  B2{  POLYFROMTEXT Ö PolyFromText(wkt[,srid]), PolygonFromText(wkt[,srid])

Constructs a POLYGON value using its WKT representation and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions  ë"|  DES_ENCRYPT
 Syntax:
DES_ENCRYPT(str[,{key_num|key_str}])

Encrypts the string with the given key using the Triple-DES algorithm.

This function works only if MySQL has been configured with SSL support.
See http://dev.mysql.com/doc/refman/5.0/en/secure-connections.html.

The encryption key to use is chosen based on the second argument to
DES_ENCRYPT(), if one was given. With no argument, the first key from
the DES key file is used. With a key_num argument, the given key number
(0-9) from the DES key file is used. With a key_str argument, the given
key string is used to encrypt str.

The key file can be specified with the --des-key-file server option.

The return string is a binary string where the first character is
CHAR(128 | key_num). If an error occurs, DES_ENCRYPT() returns NULL.

The 128 is added to make it easier to recognize an encrypted key. If
you use a string key, key_num is 127.

The string length for the result is given by this formula:

new_len = orig_len + (8 - (orig_len % 8)) + 1

Each line in the DES key file has the following format:

key_num des_key_str

Each key_num value must be a number in the range from 0 to 9. Lines in
the file may be in any order. des_key_str is the string that is used to
encrypt the message. There should be at least one space between the
number and the key. The first key is the default key that is used if
you do not specify any key argument to DES_ENCRYPT().

You can tell MySQL to read new key values from the key file with the
FLUSH DES_KEY_FILE statement. This requires the RELOAD privilege.

One benefit of having a set of default keys is that it gives
applications a way to check for the existence of encrypted column
values, without giving the end user the right to decrypt those values.

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

z mysql> SELECT customer_address FROM customer_table 
     > WHERE crypted_credit_card = DES_ENCRYPT('credit_card_number');
@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html  Ď2}  CEIL ~ Syntax:
CEIL(X)

CEIL() is a synonym for CEILING().

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html µ"~  LENGTH" ;Syntax:
LENGTH(str)

Returns the length of the string str, measured in bytes. A multi-byte
character counts as multiple bytes. This means that for a string
containing five two-byte characters, LENGTH() returns 10, whereas
CHAR_LENGTH() returns 5.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

+ mysql> SELECT LENGTH('text');
        -> 4
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html˙2  STR_TO_DATE ¦Syntax:
STR_TO_DATE(str,format)

This is the inverse of the DATE_FORMAT() function. It takes a string
str and a format string format. STR_TO_DATE() returns a DATETIME value
if the format string contains both date and time parts, or a DATE or
TIME value if the string contains only date or time parts. If the date,
time, or datetime value extracted from str is illegal, STR_TO_DATE()
returns NULL and, as of MySQL 5.0.3, produces a warning.

The server scans str attempting to match format to it. The format
string can contain literal characters and format specifiers beginning
with %. Literal characters in format must match literally in str.
Format specifiers in format must match a date or time part in str. For
the specifiers that can be used in format, see the DATE_FORMAT()
function description.

mysql> SELECT STR_TO_DATE('01,5,2013','%d,%m,%Y');
        -> '2013-05-01'
mysql> SELECT STR_TO_DATE('May 1, 2013','%M %d,%Y');
        -> '2013-05-01'

Scanning starts at the beginning of str and fails if format is found
not to match. Extra characters at the end of str are ignored.

mysql> SELECT STR_TO_DATE('a09:30:17','a%h:%i:%s');
        -> '09:30:17'
mysql> SELECT STR_TO_DATE('a09:30:17','%h:%i:%s');
        -> NULL
mysql> SELECT STR_TO_DATE('09:30:17a','%h:%i:%s');
        -> '09:30:17'

Unspecified date or time parts have a value of 0, so incompletely
specified values in str produce a result with some or all parts set to
0:

mysql> SELECT STR_TO_DATE('abc','abc');
        -> '0000-00-00'
mysql> SELECT STR_TO_DATE('9','%m');
        -> '0000-09-00'
mysql> SELECT STR_TO_DATE('9','%s');
        -> '00:00:09'

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html đ "€  Y	 » Y(p)

Returns the Y-coordinate value for the point p as a double-precision
number.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#point-property-functions

Ç mysql> SET @pt = 'Point(56.7 53.34)';
mysql> SELECT Y(GeomFromText(@pt));
+----------------------+
| Y(GeomFromText(@pt)) |
+----------------------+
|                53.34 |
+----------------------+
`http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#point-property-functions2  SHOW INNODB STATUS Ä Syntax:
SHOW INNODB STATUS

In MySQL 5.0, this is a deprecated synonym for SHOW ENGINE INNODB
STATUS. See [HELP SHOW ENGINE].

URL: http://dev.mysql.com/doc/refman/5.0/en/show-innodb-status.html

>http://dev.mysql.com/doc/refman/5.0/en/show-innodb-status.html ” 2‚  CHECKSUM TABLE ASyntax:
CHECKSUM TABLE tbl_name [, tbl_name] ... [ QUICK | EXTENDED ]

CHECKSUM TABLE reports a table checksum.

With QUICK, the live table checksum is reported if it is available, or
NULL otherwise. This is very fast. A live checksum is enabled by
specifying the CHECKSUM=1 table option when you create the table;
currently, this is supported only for MyISAM tables. See [HELP CREATE
TABLE].

With EXTENDED, the entire table is read row by row and the checksum is
calculated. This can be very slow for large tables.

If neither QUICK nor EXTENDED is specified, MySQL returns a live
checksum if the table storage engine supports it and scans the table
otherwise.

For a nonexistent table, CHECKSUM TABLE returns NULL and, as of MySQL
5.0.3, generates a warning.

The checksum value depends on the table row format. If the row format
changes, the checksum also changes. For example, the storage format for
VARCHAR changed between MySQL 4.1 and 5.0, so if a 4.1 table is
upgraded to MySQL 5.0, the checksum value may change.

URL: http://dev.mysql.com/doc/refman/5.0/en/checksum-table.html

:http://dev.mysql.com/doc/refman/5.0/en/checksum-table.htmlš"  NUMINTERIORRINGS Â NumInteriorRings(poly)

Returns the number of interior rings in the Polygon value poly.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#polygon-property-functions

Ymysql> SET @poly =
    -> 'Polygon((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1))';
mysql> SELECT NumInteriorRings(GeomFromText(@poly));
+---------------------------------------+
| NumInteriorRings(GeomFromText(@poly)) |
+---------------------------------------+
|                                     1 |
+---------------------------------------+
bhttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#polygon-property-functions  đ "„  INTERIORRINGN ń InteriorRingN(poly,N)

Returns the N-th interior ring for the Polygon value poly as a
LineString. Rings are numbered beginning with 1.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#polygon-property-functions

mysql> SET @poly =
    -> 'Polygon((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1))';
mysql> SELECT AsText(InteriorRingN(GeomFromText(@poly),1));
+----------------------------------------------+
| AsText(InteriorRingN(GeomFromText(@poly),1)) |
+----------------------------------------------+
| LINESTRING(1 1,1 2,2 2,2 1,1 1)              |
+----------------------------------------------+
bhttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#polygon-property-functions©"…  UTC_TIME Syntax:
UTC_TIME, UTC_TIME()

Returns the current UTC time as a value in 'HH:MM:SS' or HHMMSS.uuuuuu
format, depending on whether the function is used in a string or
numeric context.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

O mysql> SELECT UTC_TIME(), UTC_TIME() + 0;
        -> '18:07:53', 180753.000000
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlť2†  DROP FUNCTION$ LThe DROP FUNCTION statement is used to drop stored functions and
user-defined functions (UDFs):

o For information about dropping stored functions, see [HELP DROP
  PROCEDURE].

o For information about dropping user-defined functions, see [HELP DROP
  FUNCTION UDF].

URL: http://dev.mysql.com/doc/refman/5.0/en/drop-function.html

9http://dev.mysql.com/doc/refman/5.0/en/drop-function.html˘2‡  STDDEV SSyntax:
STDDEV(expr)

Returns the population standard deviation of expr. This function is
provided for compatibility with Oracle. As of MySQL 5.0.3, the standard
SQL function STDDEV_POP() can be used instead.

This function returns NULL if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html   đ 2  DATE_SUB š Syntax:
DATE_SUB(date,INTERVAL expr unit)

See the description for DATE_ADD().

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html‰"‰  
PERIOD_ADD ů Syntax:
PERIOD_ADD(P,N)

Adds N months to period P (in the format YYMM or YYYYMM). Returns a
value in the format YYYYMM. Note that the period argument P is not a
date value.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

6 mysql> SELECT PERIOD_ADD(200801,2);
        -> 200803
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html Ä "Š  | X Syntax:
|

Bitwise OR:

URL: http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html

% mysql> SELECT 29 | 15;
        -> 31
9http://dev.mysql.com/doc/refman/5.0/en/bit-functions.htmlP 2‹  GEOMFROMTEXT ä GeomFromText(wkt[,srid]), GeometryFromText(wkt[,srid])

Constructs a geometry value of any type using its WKT representation
and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions< "Ś  RIGHT" · Syntax:
RIGHT(str,len)

Returns the rightmost len characters from the string str, or NULL if
any argument is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

7 mysql> SELECT RIGHT('foobarbar', 4);
        -> 'rbar'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html&"Ť  DATEDIFF :Syntax:
DATEDIFF(expr1,expr2)

DATEDIFF() returns expr1 - expr2 expressed as a value in days from one
date to the other. expr1 and expr2 are date or date-and-time
expressions. Only the date parts of the values are used in the
calculation.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

” mysql> SELECT DATEDIFF('2007-12-31 23:59:59','2007-12-30');
        -> 1
mysql> SELECT DATEDIFF('2010-11-30 23:59:59','2010-12-31');
        -> -31
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  Ő2Ž  DROP PROCEDURE$ ‚Syntax:
DROP {PROCEDURE | FUNCTION} [IF EXISTS] sp_name

This statement is used to drop a stored procedure or function. That is,
the specified routine is removed from the server. As of MySQL 5.0.3,
you must have the ALTER ROUTINE privilege for the routine. (That
privilege is granted automatically to the routine creator.)

The IF EXISTS clause is a MySQL extension. It prevents an error from
occurring if the procedure or function does not exist. A warning is
produced that can be viewed with SHOW WARNINGS.

*Note*: DROP PROCEDURE IF EXISTS and DROP FUNCTION IF EXISTS are not
written to the binary log (and thus not replicated) if the stored
procedure or function named in the DROP statement does not exist on the
master. This is a known issue, which is resolved in MySQL 5.1 and
later. (Bug#13684 (http://bugs.mysql.com/13684))

URL: http://dev.mysql.com/doc/refman/5.0/en/drop-procedure.html

:http://dev.mysql.com/doc/refman/5.0/en/drop-procedure.html[2Ź  CHECK TABLE Syntax:
CHECK TABLE tbl_name [, tbl_name] ... [option] ...

option = {FOR UPGRADE | QUICK | FAST | MEDIUM | EXTENDED | CHANGED}

CHECK TABLE checks a table or tables for errors. CHECK TABLE works for
MyISAM, InnoDB, and (as of MySQL 5.0.16) ARCHIVE tables. For MyISAM
tables, the key statistics are updated as well.

As of MySQL 5.0.2, CHECK TABLE can also check views for problems, such
as tables that are referenced in the view definition that no longer
exist.

URL: http://dev.mysql.com/doc/refman/5.0/en/check-table.html

7http://dev.mysql.com/doc/refman/5.0/en/check-table.html i"  BIN" ô Syntax:
BIN(N)

Returns a string representation of the binary value of N, where N is a
longlong (BIGINT) number. This is equivalent to CONV(N,10,2). Returns
NULL if N is NULL.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

) mysql> SELECT BIN(12);
        -> '1100'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html’2‘  DECLARE CURSOR ?Syntax:
DECLARE cursor_name CURSOR FOR select_statement

This statement declares a cursor. Multiple cursors may be declared in a
stored program, but each cursor in a given block must have a unique
name.

The SELECT statement cannot have an INTO clause.

URL: http://dev.mysql.com/doc/refman/5.0/en/declare-cursor.html

:http://dev.mysql.com/doc/refman/5.0/en/declare-cursor.html  2’  	LOAD DATA 8Syntax:
LOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE 'file_name'
    [REPLACE | IGNORE]
    INTO TABLE tbl_name
    [CHARACTER SET charset_name]
    [{FIELDS | COLUMNS}
        [TERMINATED BY 'string']
        [[OPTIONALLY] ENCLOSED BY 'char']
        [ESCAPED BY 'char']
    ]
    [LINES
        [STARTING BY 'string']
        [TERMINATED BY 'string']
    ]
    [IGNORE number LINES]
    [(col_name_or_user_var,...)]
    [SET col_name = expr,...]

The LOAD DATA INFILE statement reads rows from a text file into a table
at a very high speed. The file name must be given as a literal string.

LOAD DATA INFILE is the complement of SELECT ... INTO OUTFILE. (See
http://dev.mysql.com/doc/refman/5.0/en/select.html.) To write data from
a table to a file, use SELECT ... INTO OUTFILE. To read the file back
into a table, use LOAD DATA INFILE. The syntax of the FIELDS and LINES
clauses is the same for both statements. Both clauses are optional, but
FIELDS must precede LINES if both are specified.

For more information about the efficiency of INSERT versus LOAD DATA
INFILE and speeding up LOAD DATA INFILE, see
http://dev.mysql.com/doc/refman/5.0/en/insert-speed.html.

The character set indicated by the character_set_database system
variable is used to interpret the information in the file. SET NAMES
and the setting of character_set_client do not affect interpretation of
input. If the contents of the input file use a character set that
differs from the default, it is usually preferable to specify the
character set of the file by using the CHARACTER SET clause, which is
available as of MySQL 5.0.38. A character set of binary specifies "no
conversion."

LOAD DATA INFILE interprets all fields in the file as having the same
character set, regardless of the data types of the columns into which
field values are loaded. For proper interpretation of file contents,
you must ensure that it was written with the correct character set. For
example, if you write a data file with mysqldump -T or by issuing a
SELECT ... INTO OUTFILE statement in mysql, be sure to use a
--default-character-set option with mysqldump or mysql so that output
is written in the character set to be used when the file is loaded with
LOAD DATA INFILE.

Note that it is currently not possible to load data files that use the
ucs2 character set.

As of MySQL 5.0.19, the character_set_filesystem system variable
controls the interpretation of the file name.

You can also load data files by using the mysqlimport utility; it
operates by sending a LOAD DATA INFILE statement to the server. The
--local option causes mysqlimport to read data files from the client
host. You can specify the --compress option to get better performance
over slow networks if the client and server support the compressed
protocol. See http://dev.mysql.com/doc/refman/5.0/en/mysqlimport.html.

If you use LOW_PRIORITY, execution of the LOAD DATA statement is
delayed until no other clients are reading from the table. This affects
only storage engines that use only table-level locking (MyISAM, MEMORY,
MERGE).

If you specify CONCURRENT with a MyISAM table that satisfies the
condition for concurrent inserts (that is, it contains no free blocks
in the middle), other threads can retrieve data from the table while
LOAD DATA is executing. Using this option affects the performance of
LOAD DATA a bit, even if no other thread is using the table at the same
time.

CONCURRENT is not replicated. See
http://dev.mysql.com/doc/refman/5.0/en/replication-features-load.html,
for more information.

The LOCAL keyword, if specified, is interpreted with respect to the
client end of the connection:

o If LOCAL is specified, the file is read by the client program on the
  client host and sent to the server. The file can be given as a full
  path name to specify its exact location. If given as a relative path
  name, the name is interpreted relative to the directory in which the
  client program was started.

o If LOCAL is not specified, the file must be located on the server
  host and is read directly by the server. The server uses the
  following rules to locate the file:

  o If the file name is an absolute path name, the server uses it as
    given.

  o If the file name is a relative path name with one or more leading
    components, the server searches for the file relative to the
    server's data directory.

  o If a file name with no leading components is given, the server
    looks for the file in the database directory of the default
    database.

Note that, in the non-LOCAL case, these rules mean that a file named as
./myfile.txt is read from the server's data directory, whereas the file
named as myfile.txt is read from the database directory of the default
database. For example, if db1 is the default database, the following
LOAD DATA statement reads the file data.txt from the database directory
for db1, even though the statement explicitly loads the file into a
table in the db2 database:

LOAD DATA INFILE 'data.txt' INTO TABLE db2.my_table;

Windows path names are specified using forward slashes rather than
backslashes. If you do use backslashes, you must double them.

For security reasons, when reading text files located on the server,
the files must either reside in the database directory or be readable
by all. Also, to use LOAD DATA INFILE on server files, you must have
the FILE privilege. See
http://dev.mysql.com/doc/refman/5.0/en/privileges-provided.html. For
non-LOCAL load operations, if the secure_file_priv system variable is
set to a nonempty directory name, the file to be loaded must be located
in that directory.

URL: http://dev.mysql.com/doc/refman/5.0/en/load-data.html

5http://dev.mysql.com/doc/refman/5.0/en/load-data.htmlQ2“  MULTILINESTRING × MultiLineString(ls1,ls2,...)

Constructs a MultiLineString value using LineString or WKB LineString
arguments.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions

`http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-mysql-specific-functions ô 2”  	LOCALTIME ť Syntax:
LOCALTIME, LOCALTIME()

LOCALTIME and LOCALTIME() are synonyms for NOW().

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlL 2•  MPOINTFROMTEXT Ţ MPointFromText(wkt[,srid]), MultiPointFromText(wkt[,srid])

Constructs a MULTIPOINT value using its WKT representation and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkt-functionsë2–  BLOB śBLOB[(M)]

A BLOB column with a maximum length of 65,535 (216 - 1) bytes. Each
BLOB value is stored using a two-byte length prefix that indicates the
number of bytes in the value.

An optional length M can be given for this type. If this is done, MySQL
creates the column as the smallest BLOB type large enough to hold
values M bytes long.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html p "—  SHA1
 ÎSyntax:
SHA1(str), SHA(str)

Calculates an SHA-1 160-bit checksum for the string, as described in
RFC 3174 (Secure Hash Algorithm). The value is returned as a binary
string of 40 hex digits, or NULL if the argument was NULL. One of the
possible uses for this function is as a hash key. You can also use it
as a cryptographic function for storing passwords. SHA() is synonymous
with SHA1().

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

Q mysql> SELECT SHA1('abc');
        -> 'a9993e364706816aba3e25717850c26c9cd0d89d'
@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html2  SUBSTR" Í Syntax:
SUBSTR(str,pos), SUBSTR(str FROM pos), SUBSTR(str,pos,len), SUBSTR(str
FROM pos FOR len)

SUBSTR() is a synonym for SUBSTRING().

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  "™  PASSWORD
 dSyntax:
PASSWORD(str)

Calculates and returns a password string from the plaintext password
str and returns a binary string, or NULL if the argument was NULL. This
is the function that is used for encrypting MySQL passwords for storage
in the Password column of the user grant table.

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

Y mysql> SELECT PASSWORD('badpwd');
        -> '*AAB3E285149C0135D51A520E1940DD3263DC008C'
@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html  ]2š  CHAR [NATIONAL] CHAR[(M)] [CHARACTER SET charset_name] [COLLATE
collation_name]

A fixed-length string that is always right-padded with spaces to the
specified length when stored. M represents the column length in
characters. The range of M is 0 to 255. If M is omitted, the length is
1.

*Note*: Trailing spaces are removed when CHAR values are retrieved.

Before MySQL 5.0.3, a CHAR column with a length specification greater
than 255 is converted to the smallest TEXT type that can hold values of
the given length. For example, CHAR(500) is converted to TEXT, and
CHAR(200000) is converted to MEDIUMTEXT. However, this conversion
causes the column to become a variable-length column, and also affects
trailing-space removal.

In MySQL 5.0.3 and later, a CHAR length greater than 255 is illegal and
fails with an error:

mysql> CREATE TABLE c1 (col1 INT, col2 CHAR(500));
ERROR 1074 (42000): Column length too big for column 'col' (max = 255);
use BLOB or TEXT instead

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.htmlŁ"›  UTC_DATE ˙ Syntax:
UTC_DATE, UTC_DATE()

Returns the current UTC date as a value in 'YYYY-MM-DD' or YYYYMMDD
format, depending on whether the function is used in a string or
numeric context.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

L mysql> SELECT UTC_DATE(), UTC_DATE() + 0;
        -> '2003-08-14', 20030814
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html "ś  	DIMENSION! CDimension(g)

Returns the inherent dimension of the geometry value g. The result can
be -1, 0, 1, or 2. The meaning of these values is given in
http://dev.mysql.com/doc/refman/5.0/en/gis-class-geometry.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions

=mysql> SELECT Dimension(GeomFromText('LineString(1 1,2 2)'));
+------------------------------------------------+
| Dimension(GeomFromText('LineString(1 1,2 2)')) |
+------------------------------------------------+
|                                              1 |
+------------------------------------------------+
khttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functionsr"ť  COUNT DISTINCT ĺ Syntax:
COUNT(DISTINCT expr,[expr...])

Returns a count of the number of different non-NULL values.

COUNT(DISTINCT) returns 0 if there were no matching rows.

URL: http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html

4 mysql> SELECT COUNT(DISTINCT results) FROM student;
>http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html  ° 2ž  BIT aBIT[(M)]

A bit-field type. M indicates the number of bits per value, from 1 to
64. The default is 1 if M is omitted.

This data type was added in MySQL 5.0.3 for MyISAM, and extended in
5.0.5 to MEMORY, InnoDB, BDB, and NDBCLUSTER. Before 5.0.3, BIT is a
synonym for TINYINT(1).

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html8 2ź  EQUALS ż Equals(g1,g2)

Returns 1 or 0 to indicate whether g1 is spatially equal to g2.

URL: http://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html

hhttp://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-relationships-between-geometries.html	2   SHOW CREATE VIEW ˛ Syntax:
SHOW CREATE VIEW view_name

This statement shows a CREATE VIEW statement that creates the given
view.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-create-view.html

<http://dev.mysql.com/doc/refman/5.0/en/show-create-view.htmla"ˇ  INTERVAL VSyntax:
INTERVAL(N,N1,N2,N3,...)

Returns 0 if N < N1, 1 if N < N2 and so on or -1 if N is NULL. All
arguments are treated as integers. It is required that N1 < N2 < N3 <
... < Nn for this function to work correctly. This is because a binary
search is used (very fast).

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

¶ mysql> SELECT INTERVAL(23, 1, 15, 17, 30, 44, 200);
        -> 3
mysql> SELECT INTERVAL(10, 1, 10, 100, 1000);
        -> 2
mysql> SELECT INTERVAL(22, 23, 30, 44, 200);
        -> 0
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html"˘  	FROM_DAYS Ť Syntax:
FROM_DAYS(N)

Given a day number N, returns a DATE value.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

9 mysql> SELECT FROM_DAYS(730669);
        -> '2007-07-03'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html U2Ł  ALTER PROCEDURE$  Syntax:
ALTER PROCEDURE proc_name [characteristic ...]

characteristic:
    { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }
  | SQL SECURITY { DEFINER | INVOKER }
  | COMMENT 'string'

This statement can be used to change the characteristics of a stored
procedure. More than one change may be specified in an ALTER PROCEDURE
statement. However, you cannot change the parameters or body of a
stored procedure using this statement; to make such changes, you must
drop and re-create the procedure using DROP PROCEDURE and CREATE
PROCEDURE.

As of MySQL 5.0.3, you must have the ALTER ROUTINE privilege for the
procedure. (That privilege is granted automatically to the procedure
creator.)

URL: http://dev.mysql.com/doc/refman/5.0/en/alter-procedure.html

;http://dev.mysql.com/doc/refman/5.0/en/alter-procedure.html$ "¤  	BIT_COUNT ’ Syntax:
BIT_COUNT(N)

Returns the number of bits that are set in the argument N.

URL: http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html

C mysql> SELECT BIT_COUNT(29), BIT_COUNT(b'101010');
        -> 4, 3
9http://dev.mysql.com/doc/refman/5.0/en/bit-functions.html Ü 2Ą  OCTET_LENGTH" ‰ Syntax:
OCTET_LENGTH(str)

OCTET_LENGTH() is a synonym for LENGTH().

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

<http://dev.mysql.com/doc/refman/5.0/en/string-functions.htmlń"¦  UTC_TIMESTAMP (Syntax:
UTC_TIMESTAMP, UTC_TIMESTAMP()

Returns the current UTC date and time as a value in 'YYYY-MM-DD
HH:MM:SS' or YYYYMMDDHHMMSS.uuuuuu format, depending on whether the
function is used in a string or numeric context.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

l mysql> SELECT UTC_TIMESTAMP(), UTC_TIMESTAMP() + 0;
        -> '2003-08-14 18:08:04', 20030814180804.000000
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlN"§  AES_ENCRYPT
 ˝Syntax:
AES_ENCRYPT(str,key_str)

AES_ENCRYPT() and AES_DECRYPT() allow encryption and decryption of data
using the official AES (Advanced Encryption Standard) algorithm,
previously known as "Rijndael." Encoding with a 128-bit key length is
used, but you can extend it up to 256 bits by modifying the source. We
chose 128 bits because it is much faster and it is secure enough for
most purposes.

AES_ENCRYPT() encrypts a string and returns a binary string.
AES_DECRYPT() decrypts the encrypted string and returns the original
string. The input arguments may be any length. If either argument is
NULL, the result of this function is also NULL.

Because AES is a block-level algorithm, padding is used to encode
uneven length strings and so the result string length may be calculated
using this formula:

16 x (trunc(string_length / 16) + 1)

If AES_DECRYPT() detects invalid data or incorrect padding, it returns
NULL. However, it is possible for AES_DECRYPT() to return a non-NULL
value (possibly garbage) if the input data or the key is invalid.

You can use the AES functions to store data in an encrypted form by
modifying your queries:

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

9 INSERT INTO t VALUES (1,AES_ENCRYPT('text','password'));
@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html   Ë"¨  + ] Syntax:
+

Addition:

URL: http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html

  mysql> SELECT 3+5;
        -> 8
@http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html †"©  	INET_NTOA ě Syntax:
INET_NTOA(expr)

Given a numeric network address in network byte order (4 or 8 byte),
returns the dotted-quad representation of the address as a string.

URL: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html

A mysql> SELECT INET_NTOA(3520061480);
        -> '209.207.224.40'
Chttp://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html  ˘"Ş  ACOS Í Syntax:
ACOS(X)

Returns the arc cosine of X, that is, the value whose cosine is X.
Returns NULL if X is not in the range -1 to 1.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

‚ mysql> SELECT ACOS(1);
        -> 0
mysql> SELECT ACOS(1.0001);
        -> NULL
mysql> SELECT ACOS(0);
        -> 1.5707963267949
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html  Ů2«  	ISOLATION ŠSyntax:
SET [GLOBAL | SESSION] TRANSACTION ISOLATION LEVEL
  {
       READ UNCOMMITTED
     | READ COMMITTED
     | REPEATABLE READ
     | SERIALIZABLE
   }

This statement sets the transaction isolation level globally, for the
current session, or for the next transaction:

o With the GLOBAL keyword, the statement sets the default transaction
  level globally for all subsequent sessions. Existing sessions are
  unaffected.

o With the SESSION keyword, the statement sets the default transaction
  level for all subsequent transactions performed within the current
  session.

o Without any SESSION or GLOBAL keyword, the statement sets the
  isolation level for the next (not started) transaction performed
  within the current session.

A change to the global default isolation level requires the SUPER
privilege. Any session is free to change its session isolation level
(even in the middle of a transaction), or the isolation level for its
next transaction.

To set the global default isolation level at server startup, use the
--transaction-isolation=level option to mysqld on the command line or
in an option file. Values of level for this option use dashes rather
than spaces, so the allowable values are READ-UNCOMMITTED,
READ-COMMITTED, REPEATABLE-READ, or SERIALIZABLE. For example, to set
the default isolation level to REPEATABLE READ, use these lines in the
[mysqld] section of an option file:

[mysqld]
transaction-isolation = REPEATABLE-READ

To determine the global and session transaction isolation levels at
runtime, check the value of the tx_isolation system variable:

SELECT @@GLOBAL.tx_isolation, @@tx_isolation;

InnoDB supports each of the translation isolation levels described here
using different locking strategies. The default level is REPEATABLE
READ. For additional information about InnoDB record-level locks and
how it uses them to execute various types of statements, see
http://dev.mysql.com/doc/refman/5.0/en/innodb-record-level-locks.html,
and http://dev.mysql.com/doc/refman/5.0/en/innodb-locks-set.html.

The following list describes how MySQL supports the different
transaction levels:

o READ UNCOMMITTED

  SELECT statements are performed in a nonlocking fashion, but a
  possible earlier version of a row might be used. Thus, using this
  isolation level, such reads are not consistent. This is also called a
  "dirty read." Otherwise, this isolation level works like READ
  COMMITTED.

o READ COMMITTED

  A somewhat Oracle-like isolation level with respect to consistent
  (nonlocking) reads: Each consistent read, even within the same
  transaction, sets and reads its own fresh snapshot. See
  http://dev.mysql.com/doc/refman/5.0/en/innodb-consistent-read.html.

  For locking reads (SELECT with FOR UPDATE or LOCK IN SHARE MODE),
  InnoDB locks only index records, not the gaps before them, and thus
  allows the free insertion of new records next to locked records. For
  UPDATE and DELETE statements, locking depends on whether the
  statement uses a unique index with a unique search condition (such as
  WHERE id = 100), or a range-type search condition (such as WHERE id >
  100). For a unique index with a unique search condition, InnoDB locks
  only the index record found, not the gap before it. For range-type
  searches, InnoDB locks the index range scanned, using gap locks or
  next-key (gap plus index-record) locks to block insertions by other
  sessions into the gaps covered by the range. This is necessary
  because "phantom rows" must be blocked for MySQL replication and
  recovery to work.

o REPEATABLE READ

  This is the default isolation level for InnoDB. For consistent reads,
  there is an important difference from the READ COMMITTED isolation
  level: All consistent reads within the same transaction read the
  snapshot established by the first read. This convention means that if
  you issue several plain (nonlocking) SELECT statements within the
  same transaction, these SELECT statements are consistent also with
  respect to each other. See
  http://dev.mysql.com/doc/refman/5.0/en/innodb-consistent-read.html.

  For locking reads (SELECT with FOR UPDATE or LOCK IN SHARE MODE),
  UPDATE, and DELETE statements, locking depends on whether the
  statement uses a unique index with a unique search condition, or a
  range-type search condition. For a unique index with a unique search
  condition, InnoDB locks only the index record found, not the gap
  before it. For other search conditions, InnoDB locks the index range
  scanned, using gap locks or next-key (gap plus index-record) locks to
  block insertions by other sessions into the gaps covered by the
  range.

o SERIALIZABLE

  This level is like REPEATABLE READ, but InnoDB implicitly converts
  all plain SELECT statements to SELECT ... LOCK IN SHARE MODE if
  autocommit is disabled. If autocommit is enabled, the SELECT is its
  own transaction. It therefore is known to be read only and can be
  serialized if performed as a consistent (nonlocking) read and need
  not block for other transactions. (This means that to force a plain
  SELECT to block if other transactions have modified the selected
  rows, you should disable autocommit.)

URL: http://dev.mysql.com/doc/refman/5.0/en/set-transaction.html

;http://dev.mysql.com/doc/refman/5.0/en/set-transaction.html>"¬  CEILING ’ Syntax:
CEILING(X)

Returns the smallest integer value not less than X.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

V mysql> SELECT CEILING(1.23);
        -> 2
mysql> SELECT CEILING(-1.23);
        -> -1
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html  E"­  SIN Ž Syntax:
SIN(X)

Returns the sine of X, where X is given in radians.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

e mysql> SELECT SIN(PI());
        -> 1.2246063538224e-16
mysql> SELECT ROUND(SIN(PI()));
        -> 0
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.htmlu"®  	DAYOFWEEK č Syntax:
DAYOFWEEK(date)

Returns the weekday index for date (1 = Sunday, 2 = Monday, ..., 7 =
Saturday). These index values correspond to the ODBC standard.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

4 mysql> SELECT DAYOFWEEK('2007-02-03');
        -> 7
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmla2Ż  SHOW PROCESSLIST 
Syntax:
SHOW [FULL] PROCESSLIST

SHOW PROCESSLIST shows you which threads are running. You can also get
this information using the mysqladmin processlist command. If you have
the PROCESS privilege, you can see all threads. Otherwise, you can see
only your own threads (that is, threads associated with the MySQL
account that you are using). If you do not use the FULL keyword, only
the first 100 characters of each statement are shown in the Info field.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-processlist.html

<http://dev.mysql.com/doc/refman/5.0/en/show-processlist.htmlE2°  LINEFROMWKB Ú LineFromWKB(wkb[,srid]), LineStringFromWKB(wkb[,srid])

Constructs a LINESTRING value using its WKB representation and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functionsĆ"±  GEOMETRYTYPE! )GeometryType(g)

Returns as a string the name of the geometry type of which the geometry
instance g is a member. The name corresponds to one of the instantiable
Geometry subclasses.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions

mysql> SELECT GeometryType(GeomFromText('POINT(1 1)'));
+------------------------------------------+
| GeometryType(GeomFromText('POINT(1 1)')) |
+------------------------------------------+
| POINT                                    |
+------------------------------------------+
khttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#general-geometry-property-functions  4U2˛  CREATE VIEW$ 4Syntax:
CREATE
    [OR REPLACE]
    [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}]
    [DEFINER = { user | CURRENT_USER }]
    [SQL SECURITY { DEFINER | INVOKER }]
    VIEW view_name [(column_list)]
    AS select_statement
    [WITH [CASCADED | LOCAL] CHECK OPTION]

The CREATE VIEW statement creates a new view, or replaces an existing
one if the OR REPLACE clause is given. This statement was added in
MySQL 5.0.1. If the view does not exist, CREATE OR REPLACE VIEW is the
same as CREATE VIEW. If the view does exist, CREATE OR REPLACE VIEW is
the same as ALTER VIEW.

The select_statement is a SELECT statement that provides the definition
of the view. (When you select from the view, you select in effect using
the SELECT statement.) select_statement can select from base tables or
other views.

The view definition is "frozen" at creation time, so changes to the
underlying tables afterward do not affect the view definition. For
example, if a view is defined as SELECT * on a table, new columns added
to the table later do not become part of the view.

The ALGORITHM clause affects how MySQL processes the view. The DEFINER
and SQL SECURITY clauses specify the security context to be used when
checking access privileges at view invocation time. The WITH CHECK
OPTION clause can be given to constrain inserts or updates to rows in
tables referenced by the view. These clauses are described later in
this section.

The CREATE VIEW statement requires the CREATE VIEW privilege for the
view, and some privilege for each column selected by the SELECT
statement. For columns used elsewhere in the SELECT statement you must
have the SELECT privilege. If the OR REPLACE clause is present, you
must also have the DROP privilege for the view.

A view belongs to a database. By default, a new view is created in the
default database. To create the view explicitly in a given database,
specify the name as db_name.view_name when you create it.

mysql> CREATE VIEW test.v AS SELECT * FROM t;

Base tables and views share the same namespace within a database, so a
database cannot contain a base table and a view that have the same
name.

Views must have unique column names with no duplicates, just like base
tables. By default, the names of the columns retrieved by the SELECT
statement are used for the view column names. To define explicit names
for the view columns, the optional column_list clause can be given as a
list of comma-separated identifiers. The number of names in column_list
must be the same as the number of columns retrieved by the SELECT
statement.

*Note*: When you modify an existing view, the current view definition
is backed up and saved. It is stored in that table's database
directory, in a subdirectory named arc. The backup file for a view v is
named v.frm-00001. If you alter the view again, the next backup is
named v.frm-00002. The three latest view backup definitions are stored.
Backed up view definitions are not preserved by mysqldump, or any other
such programs, but you can retain them using a file copy operation.
However, they are not needed for anything but to provide you with a
backup of your previous view definition. It is safe to remove these
backup definitions, but only while mysqld is not running. If you delete
the arc subdirectory or its files while mysqld is running, you will
receive an error the next time you try to alter the view: mysql> ALTER
VIEW v AS SELECT * FROM t; ERROR 6 (HY000): Error on delete of
'.\test\arc/v.frm-0004' (Errcode: 2)

Columns retrieved by the SELECT statement can be simple references to
table columns. They can also be expressions that use functions,
constant values, operators, and so forth.

Unqualified table or view names in the SELECT statement are interpreted
with respect to the default database. A view can refer to tables or
views in other databases by qualifying the table or view name with the
proper database name.

A view can be created from many kinds of SELECT statements. It can
refer to base tables or other views. It can use joins, UNION, and
subqueries. The SELECT need not even refer to any tables. The following
example defines a view that selects two columns from another table, as
well as an expression calculated from those columns:

mysql> CREATE TABLE t (qty INT, price INT);
mysql> INSERT INTO t VALUES(3, 50);
mysql> CREATE VIEW v AS SELECT qty, price, qty*price AS value FROM t;
mysql> SELECT * FROM v;
+------+-------+-------+
| qty  | price | value |
+------+-------+-------+
|    3 |    50 |   150 |
+------+-------+-------+

A view definition is subject to the following restrictions:

o The SELECT statement cannot contain a subquery in the FROM clause.

o The SELECT statement cannot refer to system or user variables.

o Within a stored program, the definition cannot refer to program
  parameters or local variables.

o The SELECT statement cannot refer to prepared statement parameters.

o Any table or view referred to in the definition must exist. However,
  after a view has been created, it is possible to drop a table or view
  that the definition refers to. In this case, use of the view results
  in an error. To check a view definition for problems of this kind,
  use the CHECK TABLE statement.

o The definition cannot refer to a TEMPORARY table, and you cannot
  create a TEMPORARY view.

o Any tables named in the view definition must exist at definition
  time.

o You cannot associate a trigger with a view.

o As of MySQL 5.0.52, aliases for column names in the SELECT statement
  are checked against the maximum column length of 64 characters (not
  the maximum alias length of 256 characters).

ORDER BY is allowed in a view definition, but it is ignored if you
select from a view using a statement that has its own ORDER BY.

For other options or clauses in the definition, they are added to the
options or clauses of the statement that references the view, but the
effect is undefined. For example, if a view definition includes a LIMIT
clause, and you select from the view using a statement that has its own
LIMIT clause, it is undefined which limit applies. This same principle
applies to options such as ALL, DISTINCT, or SQL_SMALL_RESULT that
follow the SELECT keyword, and to clauses such as INTO, FOR UPDATE,
LOCK IN SHARE MODE, and PROCEDURE.

If you create a view and then change the query processing environment
by changing system variables, that may affect the results that you get
from the view:

mysql> CREATE VIEW v (mycol) AS SELECT 'abc';
Query OK, 0 rows affected (0.01 sec)

mysql> SET sql_mode = '';
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT "mycol" FROM v;
+-------+
| mycol |
+-------+
| mycol |
+-------+
1 row in set (0.01 sec)

mysql> SET sql_mode = 'ANSI_QUOTES';
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT "mycol" FROM v;
+-------+
| mycol |
+-------+
| abc   |
+-------+
1 row in set (0.00 sec)

The DEFINER and SQL SECURITY clauses determine which MySQL account to
use when checking access privileges for the view when a statement is
executed that references the view. They were addded in MySQL 5.0.13,
but have no effect until MySQL 5.0.16. The legal SQL SECURITY
characteristic values are DEFINER and INVOKER. These indicate that the
required privileges must be held by the user who defined or invoked the
view, respectively. The default SQL SECURITY value is DEFINER.

If a user value is given for the DEFINER clause, it should be a MySQL
account in 'user_name'@'host_name' format (the same format used in the
GRANT statement). The user_name and host_name values both are required.
The definer can also be given as CURRENT_USER or CURRENT_USER(). The
default DEFINER value is the user who executes the CREATE VIEW
statement. This is the same as specifying DEFINER = CURRENT_USER
explicitly.

If you specify the DEFINER clause, these rules determine the legal
DEFINER user values:

o If you do not have the SUPER privilege, the only legal user value is
  your own account, either specified literally or by using
  CURRENT_USER. You cannot set the definer to some other account.

o If you have the SUPER privilege, you can specify any syntactically
  legal account name. If the account does not actually exist, a warning
  is generated.

o If the SQL SECURITY value is DEFINER but the definer account does not
  exist when the view is referenced, an error occurs.

Within a view definition, CURRENT_USER returns the view's DEFINER value
by default as of MySQL 5.0.24. For older versions, and for views
defined with the SQL SECURITY INVOKER characteristic, CURRENT_USER
returns the account for the view's invoker. For information about user
auditing within views, see
http://dev.mysql.com/doc/refman/5.0/en/account-activity-auditing.html.

Within a stored routine that is defined with the SQL SECURITY DEFINER
characteristic, CURRENT_USER returns the routine's DEFINER value. This
also affects a view defined within such a program, if the view
definition contains a DEFINER value of CURRENT_USER.

As of MySQL 5.0.16 (when the DEFINER and SQL SECURITY clauses were
implemented), view privileges are checked like this:

o At view definition time, the view creator must have the privileges
  needed to use the top-level objects accessed by the view. For
  example, if the view definition refers to table columns, the creator
  must have privileges for the columns, as described previously. If the
  definition refers to a stored function, only the privileges needed to
  invoke the function can be checked. The privileges required when the
  function runs can be checked only as it executes: For different
  invocations of the function, different execution paths within the
  function might be taken.

o When a view is referenced, privileges for objects accessed by the
  view are checked against the privileges held by the view creator or
  invoker, depending on whether the SQL SECURITY characteristic is
  DEFINER or INVOKER, respectively.

o If reference to a view causes execution of a stored function,
  privilege checking for statements executed within the function depend
  on whether the function is defined with a SQL SECURITY characteristic
  of DEFINER or INVOKER. If the security characteristic is DEFINER, the
  function runs with the privileges of its creator. If the
  characteristic is INVOKER, the function runs with the privileges
  determined by the view's SQL SECURITY characteristic.

Prior to MySQL 5.0.16 (before the DEFINER and SQL SECURITY clauses were
implemented), privileges required for objects used in a view are
checked at view creation time.

Example: A view might depend on a stored function, and that function
might invoke other stored routines. For example, the following view
invokes a stored function f():

CREATE VIEW v AS SELECT * FROM t WHERE t.id = f(t.name);

Suppose that f() contains a statement such as this:

IF name IS NULL then
  CALL p1();
ELSE
  CALL p2();
END IF;

The privileges required for executing statements within f() need to be
checked when f() executes. This might mean that privileges are needed
for p1() or p2(), depending on the execution path within f(). Those
privileges must be checked at runtime, and the user who must possess
the privileges is determined by the SQL SECURITY values of the view v
and the function f().

The DEFINER and SQL SECURITY clauses for views are extensions to
standard SQL. In standard SQL, views are handled using the rules for
SQL SECURITY INVOKER.

If you invoke a view that was created before MySQL 5.0.13, it is
treated as though it was created with a SQL SECURITY DEFINER clause and
with a DEFINER value that is the same as your account. However, because
the actual definer is unknown, MySQL issues a warning. To make the
warning go away, it is sufficient to re-create the view so that the
view definition includes a DEFINER clause.

The optional ALGORITHM clause is a MySQL extension to standard SQL. It
affects how MySQL processes the view. ALGORITHM takes three values:
MERGE, TEMPTABLE, or UNDEFINED. The default algorithm is UNDEFINED if
no ALGORITHM clause is present. For more information, see
http://dev.mysql.com/doc/refman/5.0/en/view-algorithms.html.

Some views are updatable. That is, you can use them in statements such
as UPDATE, DELETE, or INSERT to update the contents of the underlying
table. For a view to be updatable, there must be a one-to-one
relationship between the rows in the view and the rows in the
underlying table. There are also certain other constructs that make a
view nonupdatable.

The WITH CHECK OPTION clause can be given for an updatable view to
prevent inserts or updates to rows except those for which the WHERE
clause in the select_statement is true. The WITH CHECK OPTION clause
was implemented in MySQL 5.0.2.

In a WITH CHECK OPTION clause for an updatable view, the LOCAL and
CASCADED keywords determine the scope of check testing when the view is
defined in terms of another view. The LOCAL keyword restricts the CHECK
OPTION only to the view being defined. CASCADED causes the checks for
underlying views to be evaluated as well. When neither keyword is
given, the default is CASCADED.

For more information about updatable views and the WITH CHECK OPTION
clause, see
http://dev.mysql.com/doc/refman/5.0/en/view-updatability.html.

URL: http://dev.mysql.com/doc/refman/5.0/en/create-view.html

7http://dev.mysql.com/doc/refman/5.0/en/create-view.html¸ "ł  TRIM" oSyntax:
TRIM([{BOTH | LEADING | TRAILING} [remstr] FROM] str), TRIM([remstr
FROM] str)

Returns the string str with all remstr prefixes or suffixes removed. If
none of the specifiers BOTH, LEADING, or TRAILING is given, BOTH is
assumed. remstr is optional and, if not specified, spaces are removed.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

ü mysql> SELECT TRIM('  bar   ');
        -> 'bar'
mysql> SELECT TRIM(LEADING 'x' FROM 'xxxbarxxx');
        -> 'barxxx'
mysql> SELECT TRIM(BOTH 'x' FROM 'xxxbarxxx');
        -> 'bar'
mysql> SELECT TRIM(TRAILING 'xyz' FROM 'barxxyz');
        -> 'barx'
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.htmlU"´  IS ˝ Syntax:
IS boolean_value

Tests a value against a boolean value, where boolean_value can be TRUE,
FALSE, or UNKNOWN.

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

I mysql> SELECT 1 IS TRUE, 0 IS FALSE, NULL IS UNKNOWN;
        -> 1, 1, 1
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html"µ  
GET_FORMAT Syntax:
GET_FORMAT({DATE|TIME|DATETIME}, {'EUR'|'USA'|'JIS'|'ISO'|'INTERNAL'})

Returns a format string. This function is useful in combination with
the DATE_FORMAT() and the STR_TO_DATE() functions.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

° mysql> SELECT DATE_FORMAT('2003-10-03',GET_FORMAT(DATE,'EUR'));
        -> '03.10.2003'
mysql> SELECT STR_TO_DATE('10.31.2003',GET_FORMAT(DATE,'USA'));
        -> '2003-10-31'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlN2¶  TINYBLOB ű TINYBLOB

A BLOB column with a maximum length of 255 (28 - 1) bytes. Each
TINYBLOB value is stored using a one-byte length prefix that indicates
the number of bytes in the value.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html  ˘2·  	SAVEPOINT YSyntax:
SAVEPOINT identifier
ROLLBACK [WORK] TO [SAVEPOINT] identifier
RELEASE SAVEPOINT identifier

InnoDB supports the SQL statements SAVEPOINT and ROLLBACK TO SAVEPOINT.
Starting from MySQL 5.0.3, RELEASE SAVEPOINT and the optional WORK
keyword for ROLLBACK are supported as well.

URL: http://dev.mysql.com/doc/refman/5.0/en/savepoint.html

5http://dev.mysql.com/doc/refman/5.0/en/savepoint.html  8 "¸  USER ˛ Syntax:
USER()

Returns the current MySQL user name and host name as a string in the
utf8 character set.

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

4 mysql> SELECT USER();
        -> 'davida@localhost'
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.htmlĚ 2ą  ALTER TABLE$ Syntax:
ALTER [IGNORE] TABLE tbl_name
    alter_specification [, alter_specification] ...

alter_specification:
    table_options
  | ADD [COLUMN] col_name column_definition
        [FIRST | AFTER col_name ]
  | ADD [COLUMN] (col_name column_definition,...)
  | ADD {INDEX|KEY} [index_name]
        [index_type] (index_col_name,...) [index_type]
  | ADD [CONSTRAINT [symbol]] PRIMARY KEY
        [index_type] (index_col_name,...) [index_type]
  | ADD [CONSTRAINT [symbol]]
        UNIQUE [INDEX|KEY] [index_name]
        [index_type] (index_col_name,...) [index_type]
  | ADD [FULLTEXT|SPATIAL] [INDEX|KEY] [index_name]
        (index_col_name,...) [index_type]
  | ADD [CONSTRAINT [symbol]]
        FOREIGN KEY [index_name] (index_col_name,...)
        reference_definition
  | ALTER [COLUMN] col_name {SET DEFAULT literal | DROP DEFAULT}
  | CHANGE [COLUMN] old_col_name new_col_name column_definition
        [FIRST|AFTER col_name]
  | MODIFY [COLUMN] col_name column_definition
        [FIRST | AFTER col_name]
  | DROP [COLUMN] col_name
  | DROP PRIMARY KEY
  | DROP {INDEX|KEY} index_name
  | DROP FOREIGN KEY fk_symbol
  | DISABLE KEYS
  | ENABLE KEYS
  | RENAME [TO] new_tbl_name
  | ORDER BY col_name [, col_name] ...
  | CONVERT TO CHARACTER SET charset_name [COLLATE collation_name]
  | [DEFAULT] CHARACTER SET [=] charset_name [COLLATE [=] collation_name]
  | DISCARD TABLESPACE
  | IMPORT TABLESPACE

index_col_name:
    col_name [(length)] [ASC | DESC]

index_type:
    USING {BTREE | HASH | RTREE}

table_options:
    table_option [[,] table_option] ...

ALTER TABLE enables you to change the structure of an existing table.
For example, you can add or delete columns, create or destroy indexes,
change the type of existing columns, or rename columns or the table
itself. You can also change the comment for the table and type of the
table.

URL: http://dev.mysql.com/doc/refman/5.0/en/alter-table.html

7http://dev.mysql.com/doc/refman/5.0/en/alter-table.htmlI2ş  MPOINTFROMWKB Ü MPointFromWKB(wkb[,srid]), MultiPointFromWKB(wkb[,srid])

Constructs a MULTIPOINT value using its WKB representation and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions ű2»  	CHAR BYTE § The CHAR BYTE data type is an alias for the BINARY data type. This is a
compatibility feature.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html € 2Ľ  REPAIR TABLE 1Syntax:
REPAIR [NO_WRITE_TO_BINLOG | LOCAL] TABLE
    tbl_name [, tbl_name] ...
    [QUICK] [EXTENDED] [USE_FRM]

REPAIR TABLE repairs a possibly corrupted table. By default, it has the
same effect as myisamchk --recover tbl_name. REPAIR TABLE works for
MyISAM and for ARCHIVE tables. See
http://dev.mysql.com/doc/refman/5.0/en/myisam-storage-engine.html, and
http://dev.mysql.com/doc/refman/5.0/en/archive-storage-engine.html.

This statement requires SELECT and INSERT privileges for the table.

URL: http://dev.mysql.com/doc/refman/5.0/en/repair-table.html

8http://dev.mysql.com/doc/refman/5.0/en/repair-table.html"˝  MERGE$  The MERGE storage engine, also known as the MRG_MyISAM engine, is a
collection of identical MyISAM tables that can be used as one.
"Identical" means that all tables have identical column and index
information. You cannot merge MyISAM tables in which the columns are
listed in a different order, do not have exactly the same columns, or
have the indexes in different order. However, any or all of the MyISAM
tables can be compressed with myisampack. See
http://dev.mysql.com/doc/refman/5.0/en/myisampack.html. Differences in
table options such as AVG_ROW_LENGTH, MAX_ROWS, or PACK_KEYS do not
matter.

URL: http://dev.mysql.com/doc/refman/5.0/en/merge-storage-engine.html

 mysql> CREATE TABLE t1 (
    ->    a INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
    ->    message CHAR(20)) ENGINE=MyISAM;
mysql> CREATE TABLE t2 (
    ->    a INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
    ->    message CHAR(20)) ENGINE=MyISAM;
mysql> INSERT INTO t1 (message) VALUES ('Testing'),('table'),('t1');
mysql> INSERT INTO t2 (message) VALUES ('Testing'),('table'),('t2');
mysql> CREATE TABLE total (
    ->    a INT NOT NULL AUTO_INCREMENT,
    ->    message CHAR(20), INDEX(a))
    ->    ENGINE=MERGE UNION=(t1,t2) INSERT_METHOD=LAST;
@http://dev.mysql.com/doc/refman/5.0/en/merge-storage-engine.html  92ľ  CREATE TABLE$ ęSyntax:
CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name
    (create_definition,...)
    [table_options]

Or:

CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name
    [(create_definition,...)]
    [table_options]
    select_statement

Or:

CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name
    { LIKE old_tbl_name | (LIKE old_tbl_name) }

create_definition:
    col_name column_definition
  | [CONSTRAINT [symbol]] PRIMARY KEY [index_type] (index_col_name,...)
        [index_type]
  | {INDEX|KEY} [index_name] [index_type] (index_col_name,...)
        [index_type]
  | [CONSTRAINT [symbol]] UNIQUE [INDEX|KEY]
        [index_name] [index_type] (index_col_name,...)
        [index_type]
  | {FULLTEXT|SPATIAL} [INDEX|KEY] [index_name] (index_col_name,...)
        [index_type]
  | [CONSTRAINT [symbol]] FOREIGN KEY
        [index_name] (index_col_name,...) reference_definition
  | CHECK (expr)

column_definition:
    data_type [NOT NULL | NULL] [DEFAULT default_value]
      [AUTO_INCREMENT] [UNIQUE [KEY] | [PRIMARY] KEY]
      [COMMENT 'string'] [reference_definition]

data_type:
    BIT[(length)]
  | TINYINT[(length)] [UNSIGNED] [ZEROFILL]
  | SMALLINT[(length)] [UNSIGNED] [ZEROFILL]
  | MEDIUMINT[(length)] [UNSIGNED] [ZEROFILL]
  | INT[(length)] [UNSIGNED] [ZEROFILL]
  | INTEGER[(length)] [UNSIGNED] [ZEROFILL]
  | BIGINT[(length)] [UNSIGNED] [ZEROFILL]
  | REAL[(length,decimals)] [UNSIGNED] [ZEROFILL]
  | DOUBLE[(length,decimals)] [UNSIGNED] [ZEROFILL]
  | FLOAT[(length,decimals)] [UNSIGNED] [ZEROFILL]
  | DECIMAL[(length[,decimals])] [UNSIGNED] [ZEROFILL]
  | NUMERIC[(length[,decimals])] [UNSIGNED] [ZEROFILL]
  | DATE
  | TIME
  | TIMESTAMP
  | DATETIME
  | YEAR
  | CHAR[(length)]
      [CHARACTER SET charset_name] [COLLATE collation_name]
  | VARCHAR(length)
      [CHARACTER SET charset_name] [COLLATE collation_name]
  | BINARY[(length)]
  | VARBINARY(length)
  | TINYBLOB
  | BLOB
  | MEDIUMBLOB
  | LONGBLOB
  | TINYTEXT [BINARY]
      [CHARACTER SET charset_name] [COLLATE collation_name]
  | TEXT [BINARY]
      [CHARACTER SET charset_name] [COLLATE collation_name]
  | MEDIUMTEXT [BINARY]
      [CHARACTER SET charset_name] [COLLATE collation_name]
  | LONGTEXT [BINARY]
      [CHARACTER SET charset_name] [COLLATE collation_name]
  | ENUM(value1,value2,value3,...)
      [CHARACTER SET charset_name] [COLLATE collation_name]
  | SET(value1,value2,value3,...)
      [CHARACTER SET charset_name] [COLLATE collation_name]
  | spatial_type

index_col_name:
    col_name [(length)] [ASC | DESC]

index_type:
    USING {BTREE | HASH | RTREE}

reference_definition:
    REFERENCES tbl_name (index_col_name,...)
      [MATCH FULL | MATCH PARTIAL | MATCH SIMPLE]
      [ON DELETE reference_option]
      [ON UPDATE reference_option]

reference_option:
    RESTRICT | CASCADE | SET NULL | NO ACTION

table_options:
    table_option [[,] table_option] ...

table_option:
    {ENGINE|TYPE} [=] engine_name
  | AUTO_INCREMENT [=] value
  | AVG_ROW_LENGTH [=] value
  | [DEFAULT] CHARACTER SET [=] charset_name
  | CHECKSUM [=] {0 | 1}
  | [DEFAULT] COLLATE [=] collation_name
  | COMMENT [=] 'string'
  | CONNECTION [=] 'connect_string'
  | DATA DIRECTORY [=] 'absolute path to directory'
  | DELAY_KEY_WRITE [=] {0 | 1}
  | INDEX DIRECTORY [=] 'absolute path to directory'
  | INSERT_METHOD [=] { NO | FIRST | LAST }
  | MAX_ROWS [=] value
  | MIN_ROWS [=] value
  | PACK_KEYS [=] {0 | 1 | DEFAULT}
  | PASSWORD [=] 'string'
  | ROW_FORMAT [=] {DEFAULT|DYNAMIC|FIXED|COMPRESSED|REDUNDANT|COMPACT}
  | UNION [=] (tbl_name[,tbl_name]...)

select_statement:
    [IGNORE | REPLACE] [AS] SELECT ...   (Some legal select statement)

CREATE TABLE creates a table with the given name. You must have the
CREATE privilege for the table.

Rules for allowable table names are given in
http://dev.mysql.com/doc/refman/5.0/en/identifiers.html. By default,
the table is created in the default database. An error occurs if the
table exists, if there is no default database, or if the database does
not exist.

URL: http://dev.mysql.com/doc/refman/5.0/en/create-table.html

8http://dev.mysql.com/doc/refman/5.0/en/create-table.html Ń"ż  > a Syntax:
>

Greater than:

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

" mysql> SELECT 2 > 2;
        -> 0
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html2Ŕ  ANALYZE TABLE ´Syntax:
ANALYZE [NO_WRITE_TO_BINLOG | LOCAL] TABLE
    tbl_name [, tbl_name] ...

ANALYZE TABLE analyzes and stores the key distribution for a table.
During the analysis, the table is locked with a read lock for MyISAM
and BDB. For InnoDB the table is locked with a write lock. This
statement works with MyISAM, BDB, and InnoDB tables. For MyISAM tables,
this statement is equivalent to using myisamchk --analyze.

For more information on how the analysis works within InnoDB, see
http://dev.mysql.com/doc/refman/5.0/en/innodb-restrictions.html.

MySQL uses the stored key distribution to decide the order in which
tables should be joined when you perform a join on something other than
a constant. In addition, key distributions can be used when deciding
which indexes to use for a specific table within a query.

This statement requires SELECT and INSERT privileges for the table.

URL: http://dev.mysql.com/doc/refman/5.0/en/analyze-table.html

9http://dev.mysql.com/doc/refman/5.0/en/analyze-table.html¶"Á  MICROSECOND Ô Syntax:
MICROSECOND(expr)

Returns the microseconds from the time or datetime expression expr as a
number in the range from 0 to 999999.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

‡ mysql> SELECT MICROSECOND('12:00:00.123456');
        -> 123456
mysql> SELECT MICROSECOND('2009-12-31 23:59:59.000010');
        -> 10
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  ď"Â  
CONSTRAINT$ ĂInnoDB supports foreign key constraints. The syntax for a foreign key
constraint definition in InnoDB looks like this:

[CONSTRAINT [symbol]] FOREIGN KEY
    [index_name] (index_col_name, ...)
    REFERENCES tbl_name (index_col_name,...)
    [ON DELETE reference_option]
    [ON UPDATE reference_option]

reference_option:
    RESTRICT | CASCADE | SET NULL | NO ACTION

URL: http://dev.mysql.com/doc/refman/5.0/en/innodb-foreign-key-constraints.html

ËCREATE TABLE product (category INT NOT NULL, id INT NOT NULL,
                      price DECIMAL,
                      PRIMARY KEY(category, id)) ENGINE=INNODB;
CREATE TABLE customer (id INT NOT NULL,
                       PRIMARY KEY (id)) ENGINE=INNODB;
CREATE TABLE product_order (no INT NOT NULL AUTO_INCREMENT,
                            product_category INT NOT NULL,
                            product_id INT NOT NULL,
                            customer_id INT NOT NULL,
                            PRIMARY KEY(no),
                            INDEX (product_category, product_id),
                            FOREIGN KEY (product_category, product_id)
                              REFERENCES product(category, id)
                              ON UPDATE CASCADE ON DELETE RESTRICT,
                            INDEX (customer_id),
                            FOREIGN KEY (customer_id)
                              REFERENCES customer(id)) ENGINE=INNODB;
Jhttp://dev.mysql.com/doc/refman/5.0/en/innodb-foreign-key-constraints.html ő"Ă  FIELD" Syntax:
FIELD(str,str1,str2,str3,...)

Returns the index (position) of str in the str1, str2, str3, ... list.
Returns 0 if str is not found.

If all arguments to FIELD() are strings, all arguments are compared as
strings. If all arguments are numbers, they are compared as numbers.
Otherwise, the arguments are compared as double.

If str is NULL, the return value is 0 because NULL fails equality
comparison with any value. FIELD() is the complement of ELT().

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

– mysql> SELECT FIELD('ej', 'Hej', 'ej', 'Heja', 'hej', 'foo');
        -> 2
mysql> SELECT FIELD('fo', 'Hej', 'ej', 'Heja', 'hej', 'foo');
        -> 0
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.htmlN"Ä  MAKETIME ľ Syntax:
MAKETIME(hour,minute,second)

Returns a time value calculated from the hour, minute, and second
arguments.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

8 mysql> SELECT MAKETIME(12,15,30);
        -> '12:15:30'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html  ©"Ĺ  CURDATE đ Syntax:
CURDATE()

Returns the current date as a value in 'YYYY-MM-DD' or YYYYMMDD format,
depending on whether the function is used in a string or numeric
context.

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

b mysql> SELECT CURDATE();
        -> '2008-06-13'
mysql> SELECT CURDATE() + 0;
        -> 20080613
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.htmlv2Ć  SET PASSWORD 'Syntax:
SET PASSWORD [FOR user] =
    {
        PASSWORD('some password')
      | OLD_PASSWORD('some password')
      | 'encrypted password'
    }

The SET PASSWORD statement assigns a password to an existing MySQL user
account.

If the password is specified using the PASSWORD() or OLD_PASSWORD()
function, the literal text of the password should be given. If the
password is specified without using either function, the password
should be the already-encrypted password value as returned by
PASSWORD().

With no FOR clause, this statement sets the password for the current
user. Any client that has connected to the server using a nonanonymous
account can change the password for that account.

With a FOR clause, this statement sets the password for a specific
account on the current server host. Only clients that have the UPDATE
privilege for the mysql database can do this. The user value should be
given in user_name@host_name format, where user_name and host_name are
exactly as they are listed in the User and Host columns of the
mysql.user table entry. For example, if you had an entry with User and
Host column values of 'bob' and '%.loc.gov', you would write the
statement like this:

SET PASSWORD FOR 'bob'@'%.loc.gov' = PASSWORD('newpass');

URL: http://dev.mysql.com/doc/refman/5.0/en/set-password.html

8http://dev.mysql.com/doc/refman/5.0/en/set-password.html  ő2Ç  ENUM ¦ENUM('value1','value2',...) [CHARACTER SET charset_name] [COLLATE
collation_name]

An enumeration. A string object that can have only one value, chosen
from the list of values 'value1', 'value2', ..., NULL or the special ''
error value. An ENUM column can have a maximum of 65,535 distinct
values. ENUM values are represented internally as integers.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html"Č  IF FUNCTION $Syntax:
IF(expr1,expr2,expr3)

If expr1 is TRUE (expr1 <> 0 and expr1 <> NULL) then IF() returns
expr2; otherwise it returns expr3. IF() returns a numeric or string
value, depending on the context in which it is used.

URL: http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html

  mysql> SELECT IF(1>2,2,3);
        -> 3
mysql> SELECT IF(1<2,'yes','no');
        -> 'yes'
mysql> SELECT IF(STRCMP('test','test1'),'no','yes');
        -> 'no'
Bhttp://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html  -"É  DATABASE «Syntax:
DATABASE()

Returns the default (current) database name as a string in the utf8
character set. If there is no default database, DATABASE() returns
NULL. Within a stored routine, the default database is the database
that the routine is associated with, which is not necessarily the same
as the database that is the default in the calling context.

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

, mysql> SELECT DATABASE();
        -> 'test'
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html#2Ę  POINTFROMWKB · PointFromWKB(wkb[,srid])

Constructs a POINT value using its WKB representation and SRID.

URL: http://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions

Uhttp://dev.mysql.com/doc/refman/5.0/en/creating-spatial-values.html#gis-wkb-functions  Í2Ë  POWER { Syntax:
POWER(X,Y)

This is a synonym for POW().

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.htmlY"Ě  ATAN   Syntax:
ATAN(X)

Returns the arc tangent of X, that is, the value whose tangent is X.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

f mysql> SELECT ATAN(2);
        -> 1.1071487177941
mysql> SELECT ATAN(-2);
        -> -1.1071487177941
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.htmlü "Í  STRCMP" Syntax:
STRCMP(expr1,expr2)

STRCMP() returns 0 if the strings are the same, -1 if the first
argument is smaller than the second according to the current sort
order, and 1 otherwise.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-comparison-functions.html

ś mysql> SELECT STRCMP('text', 'text2');
        -> -1
mysql> SELECT STRCMP('text2', 'text');
        -> 1
mysql> SELECT STRCMP('text', 'text');
        -> 0
Ghttp://dev.mysql.com/doc/refman/5.0/en/string-comparison-functions.htmlĹ2Î  INSERT DELAYED rSyntax:
INSERT DELAYED ...

The DELAYED option for the INSERT statement is a MySQL extension to
standard SQL that is very useful if you have clients that cannot or
need not wait for the INSERT to complete. This is a common situation
when you use MySQL for logging and you also periodically run SELECT and
UPDATE statements that take a long time to complete.

When a client uses INSERT DELAYED, it gets an okay from the server at
once, and the row is queued to be inserted when the table is not in use
by any other thread.

Another major benefit of using INSERT DELAYED is that inserts from many
clients are bundled together and written in one block. This is much
faster than performing many separate inserts.

Note that INSERT DELAYED is slower than a normal INSERT if the table is
not otherwise in use. There is also the additional overhead for the
server to handle a separate thread for each table for which there are
delayed rows. This means that you should use INSERT DELAYED only when
you are really sure that you need it.

The queued rows are held only in memory until they are inserted into
the table. This means that if you terminate mysqld forcibly (for
example, with kill -9) or if mysqld dies unexpectedly, any queued rows
that have not been written to disk are lost.

There are some constraints on the use of DELAYED:

o INSERT DELAYED works only with MyISAM, MEMORY, and ARCHIVE tables.
  For engines that do not support DELAYED, an error occurs.

o An error occurs for INSERT DELAYED if used with a table that has been
  locked with LOCK TABLES because the insert must be handled by a
  separate thread, not by the session that holds the lock.

o For MyISAM tables, if there are no free blocks in the middle of the
  data file, concurrent SELECT and INSERT statements are supported.
  Under these circumstances, you very seldom need to use INSERT DELAYED
  with MyISAM.

o INSERT DELAYED should be used only for INSERT statements that specify
  value lists. The server ignores DELAYED for INSERT ... SELECT or
  INSERT ... ON DUPLICATE KEY UPDATE statements.

o Because the INSERT DELAYED statement returns immediately, before the
  rows are inserted, you cannot use LAST_INSERT_ID() to get the
  AUTO_INCREMENT value that the statement might generate.

o DELAYED rows are not visible to SELECT statements until they actually
  have been inserted.

o INSERT DELAYED is treated as a normal INSERT if the statement inserts
  multiple rows and binary logging is enabled.

o DELAYED is ignored on slave replication servers, so that INSERT
  DELAYED is treated as a normal INSERT on slaves. This is because
  DELAYED could cause the slave to have different data than the master.

o Pending INSERT DELAYED statements are lost if a table is write locked
  and ALTER TABLE is used to modify the table structure.

o INSERT DELAYED is not supported for views.

URL: http://dev.mysql.com/doc/refman/5.0/en/insert-delayed.html

:http://dev.mysql.com/doc/refman/5.0/en/insert-delayed.html2Ď  SHOW PROFILE 2Syntax:
SHOW PROFILES

The SHOW PROFILE statement display profiling information that indicates
resource usage for statements executed during the course of the current
session. It is used together with SHOW PROFILES; see [HELP SHOW
PROFILES].

URL: http://dev.mysql.com/doc/refman/5.0/en/show-profile.html

8http://dev.mysql.com/doc/refman/5.0/en/show-profile.htmlĎ"Đ  SHOW PROCEDURE CODE ŻSyntax:
SHOW PROCEDURE CODE proc_name

This statement is a MySQL extension that is available only for servers
that have been built with debugging support. It displays a
representation of the internal implementation of the named stored
procedure. A similar statement, SHOW FUNCTION CODE, displays
information about stored functions (see [HELP SHOW FUNCTION CODE]).

Both statements require that you be the owner of the routine or have
SELECT access to the mysql.proc table.

If the named routine is available, each statement produces a result
set. Each row in the result set corresponds to one "instruction" in the
routine. The first column is Pos, which is an ordinal number beginning
with 0. The second column is Instruction, which contains an SQL
statement (usually changed from the original source), or a directive
which has meaning only to the stored-routine handler.

URL: http://dev.mysql.com/doc/refman/5.0/en/show-procedure-code.html

Ámysql> DELIMITER //
mysql> CREATE PROCEDURE p1 ()
    -> BEGIN
    ->   DECLARE fanta INT DEFAULT 55;
    ->   DROP TABLE t2;
    ->   LOOP
    ->     INSERT INTO t3 VALUES (fanta);
    ->     END LOOP;
    ->   END//
Query OK, 0 rows affected (0.00 sec)

mysql> SHOW PROCEDURE CODE p1//
+-----+----------------------------------------+
| Pos | Instruction                            |
+-----+----------------------------------------+
|   0 | set fanta@0 55                         |
|   1 | stmt 9 "DROP TABLE t2"                 |
|   2 | stmt 5 "INSERT INTO t3 VALUES (fanta)" |
|   3 | jump 2                                 |
+-----+----------------------------------------+
4 rows in set (0.00 sec)
?http://dev.mysql.com/doc/refman/5.0/en/show-procedure-code.html ë2Ń  
MEDIUMTEXT –MEDIUMTEXT [CHARACTER SET charset_name] [COLLATE collation_name]

A TEXT column with a maximum length of 16,777,215 (224 - 1) characters.
The effective maximum length is less if the value contains multi-byte
characters. Each MEDIUMTEXT value is stored using a three-byte length
prefix that indicates the number of bytes in the value.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html

@http://dev.mysql.com/doc/refman/5.0/en/string-type-overview.html "Ň  LN Ů Syntax:
LN(X)

Returns the natural logarithm of X; that is, the base-e logarithm of X.
If X is less than or equal to 0, then NULL is returned.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

W mysql> SELECT LN(2);
        -> 0.69314718055995
mysql> SELECT LN(-2);
        -> NULL
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.htmlÉ2Ó  RETURN †Syntax:
RETURN expr

The RETURN statement terminates execution of a stored function and
returns the value expr to the function caller. There must be at least
one RETURN statement in a stored function. There may be more than one
if the function has multiple exit points.

This statement is not used in stored procedures or triggers.

URL: http://dev.mysql.com/doc/refman/5.0/en/return.html

2http://dev.mysql.com/doc/refman/5.0/en/return.html 2Ô  SHOW COLLATION ESyntax:
SHOW COLLATION
    [LIKE 'pattern' | WHERE expr]

This statement lists collations supported by the server. By default,
the output from SHOW COLLATION includes all available collations. The
LIKE clause, if present, indicates which collation names to match. The
WHERE clause can be given to select rows using more general conditions,
as discussed in
http://dev.mysql.com/doc/refman/5.0/en/extended-show.html. For example:

mysql> SHOW COLLATION LIKE 'latin1%';
+-------------------+---------+----+---------+----------+---------+
| Collation         | Charset | Id | Default | Compiled | Sortlen |
+-------------------+---------+----+---------+----------+---------+
| latin1_german1_ci | latin1  |  5 |         |          |       0 |
| latin1_swedish_ci | latin1  |  8 | Yes     | Yes      |       0 |
| latin1_danish_ci  | latin1  | 15 |         |          |       0 |
| latin1_german2_ci | latin1  | 31 |         | Yes      |       2 |
| latin1_bin        | latin1  | 47 |         | Yes      |       0 |
| latin1_general_ci | latin1  | 48 |         |          |       0 |
| latin1_general_cs | latin1  | 49 |         |          |       0 |
| latin1_spanish_ci | latin1  | 94 |         |          |       0 |
+-------------------+---------+----+---------+----------+---------+

URL: http://dev.mysql.com/doc/refman/5.0/en/show-collation.html

:http://dev.mysql.com/doc/refman/5.0/en/show-collation.htmlń"Ő  LOG FSyntax:
LOG(X), LOG(B,X)

If called with one parameter, this function returns the natural
logarithm of X. If X is less than or equal to 0, then NULL is returned.

The inverse of this function (when called with a single argument) is
the EXP() function.

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

Y mysql> SELECT LOG(2);
        -> 0.69314718055995
mysql> SELECT LOG(-2);
        -> NULL
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html•2Ö  SET SQL_LOG_BIN @Syntax:
SET sql_log_bin = {0|1}

Disables or enables binary logging for the current connection
(sql_log_bin is a session variable) if the client has the SUPER
privilege. The statement is refused with an error if the client does
not have that privilege.

URL: http://dev.mysql.com/doc/refman/5.0/en/set-sql-log-bin.html

;http://dev.mysql.com/doc/refman/5.0/en/set-sql-log-bin.html6"×  != c Syntax:
<>, !=

Not equal:

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

„ mysql> SELECT '.01' <> '0.01';
        -> 1
mysql> SELECT .01 <> '0.01';
        -> 0
mysql> SELECT 'zapp' <> 'zappp';
        -> 1
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html  Š"Ř  WHILE żSyntax:
[begin_label:] WHILE search_condition DO
    statement_list
END WHILE [end_label]

The statement list within a WHILE statement is repeated as long as the
search_condition is true. statement_list consists of one or more
statements.

A WHILE statement can be labeled. end_label cannot be given unless
begin_label also is present. If both are present, they must be the
same.

URL: http://dev.mysql.com/doc/refman/5.0/en/while-statement.html

~ CREATE PROCEDURE dowhile()
BEGIN
  DECLARE v1 INT DEFAULT 5;

  WHILE v1 > 0 DO
    ...
    SET v1 = v1 - 1;
  END WHILE;
END
;http://dev.mysql.com/doc/refman/5.0/en/while-statement.html  k2Ů  AES_DECRYPT
 Syntax:
AES_DECRYPT(crypt_str,key_str)

This function allows decryption of data using the official AES
(Advanced Encryption Standard) algorithm. For more information, see the
description of AES_ENCRYPT().

URL: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html

@http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html Ď"Ú  DAYNAME =Syntax:
DAYNAME(date)

Returns the name of the weekday for date. As of MySQL 5.0.25, the
language used for the name is controlled by the value of the
lc_time_names system variable
(http://dev.mysql.com/doc/refman/5.0/en/locale-support.html).

URL: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html

; mysql> SELECT DAYNAME('2007-02-03');
        -> 'Saturday'
Chttp://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html Ş"Ű  COERCIBILITY Ą Syntax:
COERCIBILITY(str)

Returns the collation coercibility value of the string argument.

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

« mysql> SELECT COERCIBILITY('abc' COLLATE latin1_swedish_ci);
        -> 0
mysql> SELECT COERCIBILITY(USER());
        -> 3
mysql> SELECT COERCIBILITY('abc');
        -> 4
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html  %2Ü  INT Ö INT[(M)] [UNSIGNED] [ZEROFILL]

A normal-size integer. The signed range is -2147483648 to 2147483647.
The unsigned range is 0 to 4294967295.

URL: http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Ahttp://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.htmlT "Ý  GLENGTH ę GLength(ls)

Returns as a double-precision number the length of the LineString value
ls in its associated spatial reference.

URL: http://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#linestring-property-functions

ń mysql> SET @ls = 'LineString(1 1,2 2,3 3)';
mysql> SELECT GLength(GeomFromText(@ls));
+----------------------------+
| GLength(GeomFromText(@ls)) |
+----------------------------+
|            2.8284271247462 |
+----------------------------+
ehttp://dev.mysql.com/doc/refman/5.0/en/geometry-property-functions.html#linestring-property-functionsP "Ţ  RADIANS Ä Syntax:
RADIANS(X)

Returns the argument X, converted from degrees to radians. (Note that
Ď€ radians equals 180 degrees.)

URL: http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

6 mysql> SELECT RADIANS(90);
        -> 1.5707963267949
Bhttp://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.htmlg"ß  	COLLATION Ź Syntax:
COLLATION(str)

Returns the collation of the string argument.

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

 mysql> SELECT COLLATION('abc');
        -> 'latin1_swedish_ci'
mysql> SELECT COLLATION(_utf8'abc');
        -> 'utf8_general_ci'
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.html v"ŕ  COALESCE Ľ Syntax:
COALESCE(value,...)

Returns the first non-NULL value in the list, or NULL if there are no
non-NULL values.

URL: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html

e mysql> SELECT COALESCE(NULL,1);
        -> 1
mysql> SELECT COALESCE(NULL,NULL,NULL);
        -> NULL
@http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html  I"á  VERSION ľ Syntax:
VERSION()

Returns a string that indicates the MySQL server version. The string
uses the utf8 character set.

URL: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html

6 mysql> SELECT VERSION();
        -> '5.0.85-standard'
Ahttp://dev.mysql.com/doc/refman/5.0/en/information-functions.htmlĎ"â  MAKE_SET" vSyntax:
MAKE_SET(bits,str1,str2,...)

Returns a set value (a string containing substrings separated by ","
characters) consisting of the strings that have the corresponding bit
in bits set. str1 corresponds to bit 0, str2 to bit 1, and so on. NULL
values in str1, str2, ... are not appended to the result.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

mysql> SELECT MAKE_SET(1,'a','b','c');
        -> 'a'
mysql> SELECT MAKE_SET(1 | 4,'hello','nice','world');
        -> 'hello,world'
mysql> SELECT MAKE_SET(1 | 4,'hello','nice',NULL,'world');
        -> 'hello'
mysql> SELECT MAKE_SET(0,'a','b','c');
        -> ''
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html  "ă  FIND_IN_SET" …Syntax:
FIND_IN_SET(str,strlist)

Returns a value in the range of 1 to N if the string str is in the
string list strlist consisting of N substrings. A string list is a
string composed of substrings separated by "," characters. If the first
argument is a constant string and the second is a column of type SET,
the FIND_IN_SET() function is optimized to use bit arithmetic. Returns
0 if str is not in strlist or if strlist is the empty string. Returns
NULL if either argument is NULL. This function does not work properly
if the first argument contains a comma (",") character.

URL: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

7 mysql> SELECT FIND_IN_SET('b','a,b,c,d');
        -> 2
<http://dev.mysql.com/doc/refman/5.0/en/string-functions.html