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https://dev.mysql.com/doc/refman/5.7/en/performance-schema-timing.html
Events are collected by means of instrumentation added to the server source code. Instruments time events, which is how the Performance Schema provides an idea of how long events take. It is also possible to configure instruments not to collect ...
https://dev.mysql.com/doc/refman/5.7/en/sha256-pluggable-authentication.html
MySQL provides two authentication plugins that implement SHA-256 hashing for user account passwords: sha256_password: Implements basic SHA-256 authentication. caching_sha2_password: Implements SHA-256 authentication (like sha256_password), but uses ...
https://dev.mysql.com/doc/refman/5.7/en/show-engine.html
SHOW ENGINE engine_name {STATUS | MUTEX} SHOW ENGINE displays operational information about a storage engine. The statement has these variants: SHOW ENGINE INNODB STATUS SHOW ENGINE INNODB MUTEX SHOW ENGINE PERFORMANCE_SCHEMA STATUS SHOW ENGINE ...
https://dev.mysql.com/doc/refman/5.7/en/stored-programs-logging.html
The binary log contains information about SQL statements that modify database contents. This information is stored in the form of “events” that describe the modifications. (Binary log events differ from scheduled event stored objects.) The ...
https://dev.mysql.com/doc/refman/5.7/en/sys-statement-analysis.html
The statement_analysis and x$statement_analysis views have these columns: query The normalized statement string. db The default database for the statement, or NULL if there is none. full_scan The total number of full table scans performed by ...
https://dev.mysql.com/doc/refman/5.7/en/problems-with-alias.html
An alias can be used in a query select list to give a column a different name. This restriction is imposed because when the WHERE clause is evaluated, the column value may not yet have been determined. In the select list of a query, a quoted column ...
https://dev.mysql.com/doc/refman/5.7/en/windows-start-service.html
It reads options from the [mysqld] group and the group that has the same name as the service in the standard option files. This enables you to use the [mysqld] group for options that should be used by all MySQL services, and an option group with the ... On Windows, the recommended way to run MySQL is to install it as a Windows service, so that MySQL starts and stops automatically when Windows starts and ...
https://dev.mysql.com/doc/refman/5.7/en/semijoins.html
It must not be implicitly grouped (it must contain no aggregate functions). FirstMatch: When scanning the inner tables for row combinations and there are multiple instances of a given value group, choose one rather than returning them all. A ...
https://dev.mysql.com/doc/refman/5.7/en/internal-temporary-tables.html
Evaluation of statements that contain an ORDER BY clause and a different GROUP BY clause, or for which the ORDER BY or GROUP BY contains columns from tables other than the first table in the join queue. In some cases, the server creates internal ...
https://dev.mysql.com/doc/refman/5.7/en/using-encrypted-connections.html
Several configuration parameters are available to indicate whether to use encrypted connections, and to specify the appropriate certificate and key files. This section provides general guidance about configuring the server and clients for encrypted ...