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https://dev.mysql.com/doc/refman/5.7/en/performance-schema-pre-filtering.html
Generally, the effect is to reset the summary columns to 0 or NULL, not to remove rows. Pre-filtering is done by the Performance Schema and has a global effect that applies to all users. Pre-filtering can be applied to either the producer or ...
https://dev.mysql.com/doc/refman/5.7/en/row-subqueries.html
The expression is unknown (that is, NULL) if the subquery produces no rows. Scalar or column subqueries return a single value or a column of values. A row subquery is a subquery variant that returns a single row and can thus return more than one ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-select-all.html
Usage ndb_select_all -c connection_string tbl_name -d db_name [> file_name] Options that can be used with ndb_select_all are shown in the following table. --connect-string Command-Line Format --connect-string=connection_string Type String Default ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-system-variables.html
group_replication_force_members Command-Line Format --group-replication-force-members=value Introduced 5.7.17 System Variable group_replication_force_members Scope Global Dynamic Yes Type String A list of peer addresses as a comma separated list ...
https://dev.mysql.com/doc/refman/5.7/en/charset-collation-coercibility.html
For example, this statement performs a comparison between the column x and the string literal 'Y': SELECT x FROM T WHERE x = 'Y'; If x and 'Y' have the same collation, there is no ambiguity about the collation to use for the comparison. For example, ... In the great majority of statements, it is obvious what collation MySQL uses to resolve a comparison ...
https://dev.mysql.com/doc/refman/5.7/en/alter-user.html
In one case only, the account may be specified with the USER() function: ALTER USER USER() IDENTIFIED BY 'auth_string'; This syntax enables changing your own password without naming your account literally. The plugin name can be a quoted string ...
https://dev.mysql.com/doc/refman/5.7/en/mysqld-safe.html
--core-file-size=size Command-Line Format --core-file-size=size Type String Command-Line Format --core-file-size=size Type String The size of the core file that mysqld should be able to create. --malloc-lib=[lib_name] Command-Line Format ...
https://dev.mysql.com/doc/refman/5.7/en/federated-create-server.html
If you are creating a number of FEDERATED tables on the same server, or if you want to simplify the process of creating FEDERATED tables, you can use the CREATE SERVER statement to define the server connection parameters, just as you would with the ...If you specify only the connection name without a table name, the table name of the local table is used ...
https://dev.mysql.com/doc/refman/5.7/en/hexadecimal-literals.html
For example, a hexadecimal literal assigned to a user-defined variable is a binary string by default. The 0x notation is based on ODBC, for which hexadecimal strings are often used to supply values for BLOB columns. To convert a string or a number ... Hexadecimal literal values are written using X'val' or 0xval notation, where val contains hexadecimal digits (0..9, ...
https://dev.mysql.com/doc/refman/5.7/en/audit-log-filter-definitions.html
Arguments can refer to predefined variables, event fields, or string or numeric constants. The following list describes the permitted predefined functions for function items: audit_log_exclude_accounts_is_null() Checks whether the ...For information ...