No cache version.
Caching disabled. Default setting for this page:enabled (code DEF204)If the display is too slow, you can disable the user mode to view the cached version.
Rechercher dans le manuel MySQL
Search Results
https://dev.mysql.com/mysql-cluster-tcp-definition.html
TCP/IP is the default transport mechanism for all connections between nodes in an NDB Cluster. Normally it is not necessary to define TCP/IP connections; NDB Cluster automatically sets up such connections for all data nodes, management nodes, and ...
https://dev.mysql.com/mysql-indexes.html
Comparison of dissimilar columns (comparing a string column to a temporal or numeric column, for example) may prevent use of indexes if values cannot be compared directly without conversion. For a given value such as 1 in the numeric column, it ...
https://dev.mysql.com/mysql-tips.html
Suppose that an indexed string column c1 is compared to a numeric value using WHERE c1 = 2222. For such comparisons, the string value is converted to a number and the operands are compared numerically (see Section 12.2, “Type Conversion in ...
https://dev.mysql.com/mysqld-safe.html
--user={user_name|user_id} Run the mysqld server as the user having the name user_name or the numeric user ID user_id. mysqld_safe is the recommended way to start a mysqld server on Unix. mysqld_safe adds some safety features such as restarting the ...
https://dev.mysql.com/optimize-character.html
See Section 8.4.2.1, “Optimizing for Numeric Data” for reasons why a numeric column is usually preferable to an equivalent string column. For character and string columns, follow these guidelines: Use binary collation order for fast comparison ...
https://dev.mysql.com/other-vendor-data-types.html
To facilitate the use of code written for SQL implementations from other vendors, MySQL maps data types as shown in the following table. These mappings make it easier to import table definitions from other database systems into MySQL. If you create ...
https://dev.mysql.com/out-of-range-and-overflow.html
If no restrictive modes are enabled, MySQL clips the value to the appropriate endpoint of the column data type range and stores the resulting value instead. When an out-of-range value is assigned to an integer column, MySQL stores the value ...
https://dev.mysql.com/partitioning-limitations-functions.html
Each of these functions returns an integer only if it is passed an argument of an exact numeric type, such as one of the INT types or DECIMAL. (Bug #54483) See Section 12.6.2, “Mathematical Functions”, for more information about the return types ... This section discusses limitations in MySQL Partitioning relating specifically to functions used in partitioning ...
https://dev.mysql.com/performance-schema-functions.html
FORMAT_BYTES(count) Given a numeric byte count, converts it to human-readable format and returns a string consisting of a value and a units indicator. FORMAT_PICO_TIME(time_val) Given a numeric Performance Schema latency or wait time in picoseconds, ... As of MySQL 8.0.16, MySQL includes built-in SQL functions that format or retrieve Performance Schema data, and that may be used as equivalents for the corresponding sys schema stored ...
https://dev.mysql.com/precision-math-examples.html
If the argument to an aggregate function is an exact numeric type, the result is also an exact numeric type, with a scale at least that of the argument. This section provides some examples that show precision math query results in MySQL. These ...
Document created the 26/06/2006, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/mysql-rf-fct-numeric-p-9.html
The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.
References
These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.
