Rechercher dans le manuel MySQL

Displaying 81 to 90 of 269 total results
https://dev.mysql.com/number-literals.html
Number literals include exact-value (integer and DECIMAL) literals and approximate-value (floating-point) literals. Exact-value numeric literals have an integer part or fractional part, or both. An integer may be used in a floating-point context; ...Numbers may be preceded by - or + to indicate a negative or positive value, ...
https://dev.mysql.com/partitioning-hash.html
To partition a table using HASH partitioning, it is necessary to append to the CREATE TABLE statement a PARTITION BY HASH (expr) clause, where expr is an expression that returns an integer. This can simply be the name of a column whose type is one ... Partitioning by HASH is used primarily to ensure an even distribution of data among a predetermined number of ...
https://dev.mysql.com/plugin-data-structures.html
MYSQL_THDVAR_STR(name, opt, comment, check, update, default) MYSQL_SYSVAR_STR(name, varname, opt, comment, check, update, default) Integer system variables, of which there are several varieties. version: The plugin version as an array of three ... A ...
https://dev.mysql.com/precision-math-expressions.html
In strict SQL mode, for INSERT into a column with an exact data type (DECIMAL or integer), a number is inserted with its exact value if it is within the column range. The expression is exact and is evaluated using integer arithmetic and has a ...
https://dev.mysql.com/string-functions.html
For functions that take length arguments, noninteger arguments are rounded to the nearest integer. [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 ...
https://dev.mysql.com/c-api-prepared-statement-type-conversions.html
Here are some examples: If you use MYSQL_TYPE_LONG with an int variable to pass an integer value to the server that is to be stored into a FLOAT column, MySQL converts the value to floating-point format before storing it. Prepared statements ...
https://dev.mysql.com/diagnostics-area.html
The statement information part of the diagnostics area contains these items: NUMBER: An integer indicating the number of condition areas that have information. ROW_COUNT: An integer indicating the number of rows affected by the statement. SQL ...
https://dev.mysql.com/example-auto-increment.html
Use the smallest integer data type for the AUTO_INCREMENT column that is large enough to hold the maximum sequence value you will need. See Section 11.2.1, “Integer Types (Exact Value) - INTEGER, INT, SMALLINT, TINYINT, MEDIUMINT, BIGINT” for ...
https://dev.mysql.com/innodb-auto-increment-handling.html
If the AUTO_INCREMENT value becomes larger than the maximum integer for the specified integer type In all lock modes (0, 1, and 2), the behavior of the auto-increment mechanism is not defined if the value becomes larger than the maximum integer that ... InnoDB provides a configurable locking mechanism that can significantly improve scalability and performance of SQL statements that add rows to tables with AUTO_INCREMENT ...
https://dev.mysql.com/innodb-memcached-internals.html
Because the InnoDB memcached plugin is tightly integrated with a single memcached daemon, and the in-memory caching mechanism is handled by MySQL and the InnoDB buffer pool, this column is rarely needed. Because the InnoDB memcached plugin is ...
Displaying 81 to 90 of 269 total results

Rechercher dans le manuel MySQL

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Document créé le 26/06/2006, dernière modification le 26/10/2018
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