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https://dev.mysql.com/doc/refman/8.4/en/role-names.html
MySQL role names refer to roles, which are named collections of privileges. Role names have syntax and semantics similar to account names; see Section 8.2.4, “Specifying Account Names”. As stored in the grant tables, they have the same ...
https://dev.mysql.com/doc/refman/8.4/en/row-subqueries.html
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 column value. If this row has col3 and col4 values equal to the col1 and col2 ...
https://dev.mysql.com/doc/refman/8.4/en/searching-on-two-keys.html
An OR using a single key is well optimized, as is the handling of AND. The one tricky case is that of searching on two different keys combined with OR: SELECT field1_index, field2_index FROM test_table WHERE field1_index = '1' OR field2_index = '1' ...
https://dev.mysql.com/doc/refman/8.4/en/server-option-variable-reference.html
The following table lists all command-line options, system variables, and status variables applicable within mysqld. The table lists command-line options (Cmd-line), options valid in configuration files (Option file), server system variables ...
https://dev.mysql.com/doc/refman/8.4/en/set-character-set.html
SET {CHARACTER SET | CHARSET} {'charset_name' | DEFAULT} This statement maps all strings sent between the server and the current client with the given mapping. SET CHARACTER SET sets three session system variables: character_set_client and ...
https://dev.mysql.com/doc/refman/8.4/en/set-default-role.html
SET DEFAULT ROLE {NONE | ALL | role [, role ] ...} TO user [, user ] ... For each user named immediately after the TO keyword, this statement defines which roles become active when the user connects to the server and authenticates, or when the user ...
https://dev.mysql.com/doc/refman/8.4/en/set-names.html
SET NAMES {'charset_name' [COLLATE 'collation_name'] | DEFAULT} This statement sets the three session system variables character_set_client, character_set_connection, and character_set_results to the given character set. Setting ...
https://dev.mysql.com/doc/refman/8.4/en/set-resource-group.html
SET RESOURCE GROUP group_name [FOR thread_id [, thread_id] ...] SET RESOURCE GROUP is used for resource group management (see Section 7.1.16, “Resource Groups”). Thread IDs can be determined from the Performance Schema threads table. If the ...
https://dev.mysql.com/doc/refman/8.4/en/show-binlog-events.html
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. The LIMIT clause has the same syntax as for the SELECT statement.
https://dev.mysql.com/doc/refman/8.4/en/show-create-table.html
SHOW CREATE TABLE tbl_name Shows the CREATE TABLE statement that creates the named table. To use this statement, you must have some privilege for the table. row *************************** Table: t Create Table: CREATE TABLE `t` ( `id` int NOT NULL ...