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https://dev.mysql.com/doc/refman/9.7/en/savepoint.html
SAVEPOINT identifier ROLLBACK [WORK] TO [SAVEPOINT] identifier RELEASE SAVEPOINT identifier InnoDB supports the SQL statements SAVEPOINT, ROLLBACK TO SAVEPOINT, RELEASE SAVEPOINT and the optional WORK keyword for ROLLBACK. The SAVEPOINT statement ...
https://dev.mysql.com/doc/refman/9.7/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/9.7/en/security-guidelines.html
Anyone using MySQL on a computer connected to the Internet should read this section to avoid the most common security mistakes. In discussing security, it is necessary to consider fully protecting the entire server host (not just the MySQL server) ...
https://dev.mysql.com/doc/refman/9.7/en/select.html
SELECT [ALL | DISTINCT | DISTINCTROW ] [HIGH_PRIORITY] [STRAIGHT_JOIN] [SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_BUFFER_RESULT] [SQL_NO_CACHE] [SQL_CALC_FOUND_ROWS] select_expr [, select_expr] ... [into_option] [FROM table_references [PARTITION ...
https://dev.mysql.com/doc/refman/9.7/en/server-configuration-defaults.html
The MySQL server has many operating parameters, which you can change at server startup using command-line options or configuration files (option files). For general instructions on setting parameters at startup or runtime, see Section 7.1.7, ...
https://dev.mysql.com/doc/refman/9.7/en/server-configuration-validation.html
MySQL supports a --validate-config option that enables the startup configuration to be checked for problems without running the server in normal operational mode: mysqld --validate-config If no errors are found, the server terminates with an exit ...
https://dev.mysql.com/doc/refman/9.7/en/server-configuration.html
The MySQL server, mysqld, has many command options and system variables that can be set at startup to configure its operation. To determine the default command option and system variable values used by the server, execute this command: $> mysqld ...
https://dev.mysql.com/doc/refman/9.7/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/9.7/en/session-state-tracking.html
A client can enable these trackers to receive notification of changes to its session state. Uses for Session State Trackers Available Session State Trackers C API Session State Tracker Support Test Suite Session State Tracker Support Uses for ...
https://dev.mysql.com/doc/refman/9.7/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 ...