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https://dev.mysql.com/doc/refman/8.4/en/replication-statements-source.html
Section 15.4.2, “SQL Statements for Controlling Replica Servers”, discusses statements for managing replica servers. In addition to the statements described here, the following SHOW statements are used with source servers in replication. SHOW ...
https://dev.mysql.com/doc/refman/8.4/en/request-access.html
After the server accepts a connection, it enters Stage 2 of access control. For each request that you issue through the connection, the server determines what operation you want to perform, then checks whether your privileges are sufficient. This ...
https://dev.mysql.com/doc/refman/8.4/en/reserved-accounts.html
One part of the MySQL installation process is data directory initialization (see Section 2.9.1, “Initializing the Data Directory”). During data directory initialization, MySQL creates user accounts that should be considered reserved: ...
https://dev.mysql.com/doc/refman/8.4/en/resource-group-statements.html
MySQL supports creation and management of resource groups, and permits assigning threads running within the server to particular groups so that threads execute according to the resources available to the group. This section describes the SQL ...
https://dev.mysql.com/doc/refman/8.4/en/retrieving-data.html
The SELECT statement is used to pull information from a table. The general form of the statement is: SELECT what_to_select FROM which_table WHERE conditions_to_satisfy; what_to_select indicates what you want to see. This can be a list of columns, ...
https://dev.mysql.com/doc/refman/8.4/en/rewriter-query-rewrite-plugin.html
MySQL supports query rewrite plugins that can examine and possibly modify SQL statements received by the server before the server executes them. MySQL distributions include a postparse query rewrite plugin named Rewriter and scripts for installing ...
https://dev.mysql.com/doc/refman/8.4/en/row-constructor-optimization.html
For example, these two statements are semantically equivalent: SELECT * FROM t1 WHERE (column1,column2) = (1,1); SELECT * FROM t1 WHERE column1 = 1 AND column2 = 1; In addition, the optimizer handles both expressions the same way. The optimizer is ...
https://dev.mysql.com/doc/refman/8.4/en/scalar-subqueries.html
In its simplest form, a subquery is a scalar subquery that returns a single value. A scalar subquery is a simple operand, and you can use it almost anywhere a single column value or literal is legal, and you can expect it to have those ...
https://dev.mysql.com/doc/refman/8.4/en/security-options.html
The following table shows mysqld options and system variables that affect security. For descriptions of each of these, see Section 7.1.7, “Server Command Options”, and Section 7.1.8, “Server System Variables”.
https://dev.mysql.com/doc/refman/8.4/en/selecting-all.html
For example, you may happen to think that the birth date for Bowser doesn't seem quite right. Consulting your original pedigree papers, you find that the correct birth year should be 1989, not 1979. Fix only the erroneous record with an UPDATE ...