https://dev.mysql.com/accounts-table.html
This is NULL for an internal thread, or for a user session that failed to authenticate. This is NULL for an internal thread, or for a user session that failed to authenticate. The accounts table contains a row for each account that has connected to ...
https://dev.mysql.com/arithmetic-functions.html
(See Section 11.1, “Numeric Data Types”.) / Division: mysql> SELECT 3/5; -> 0.60 Division by zero produces a NULL result: mysql> SELECT 102/(1-1); -> NULL A division is calculated with BIGINT arithmetic only if performed in a context where its ... Table 12.8 Arithmetic Operators Name Description %, MOD Modulo operator * Multiplication operator + Addition operator - Minus operator - Change the sign of the argument / Division operator DIV Integer division The usual arithmetic operators are ...
https://dev.mysql.com/audit-log-filter-definitions.html
The following list describes the permitted predefined functions for function items: audit_log_exclude_accounts_is_null() Checks whether the audit_log_exclude_accounts system variable is NULL. For information about using JSON data in MySQL, see ...
https://dev.mysql.com/c-api-encrypted-connections.html
A NULL return value indicates that encryption is not being used. A non-NULL return value indicates an encrypted connection and names the encryption cipher. This section describes how C applications use the C API capabilities for encrypted ...
https://dev.mysql.com/cast-functions.html
row *************************** Table: new_table Create Table: CREATE TABLE `new_table` ( `c1` date DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 The cast functions are useful for sorting ENUM columns in lexical order. Examples: For ... Table ...
https://dev.mysql.com/change-master-to.html
NULL, which is the default, means no security context is used. ] CHANGE MASTER TO changes the parameters that the slave server uses for connecting to the master server, for reading the master binary log, and reading the slave relay log. It also ...
https://dev.mysql.com/charset-collation-coercibility.html
NULL or an expression that is derived from NULL has a coercibility of 6. In the great majority of statements, it is obvious what collation MySQL uses to resolve a comparison operation. For example, in the following cases, it should be clear that ...
https://dev.mysql.com/charset-connection.html
To tell the server to perform no conversion of result sets or error messages, set character_set_results to NULL or binary: SET character_set_results = NULL; SET character_set_results = binary; For more information about character sets and error ...
https://dev.mysql.com/clone-progress-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.17. The clone_progress table shows progress information for the current or last executed cloning operation only. The stages of a cloning operation include DROP DATA, FILE ...
https://dev.mysql.com/constraint-foreign-key.html
The available referential actions are RESTRICT, CASCADE, SET NULL, and NO ACTION (the default). Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL supports ...
