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https://dev.mysql.com/doc/refman/5.7/en/mysql-installer-setup.html
Lists all pending installation requirements by product and indicates the status as follows: A blank space in the Status column means that MySQL Installer can attempt to download and install the required software for you. The word Manual in the ...
https://dev.mysql.com/doc/refman/5.7/en/nested-loop-joins.html
Only columns of interest to a join are stored in its join buffer, not whole rows. MySQL executes joins between tables using a nested-loop algorithm or variations on it. Nested-Loop Join Algorithm Block Nested-Loop Join Algorithm Nested-Loop Join ...
https://dev.mysql.com/doc/refman/5.7/en/no-login-pluggable-authentication.html
The mysql_no_login server-side authentication plugin prevents all client connections to any account that uses it. Use cases for this plugin include: Accounts that must be able to execute stored programs and views with elevated privileges without ...
https://dev.mysql.com/doc/refman/5.7/en/non-typed-operators.html
->> Return value from JSON column after evaluating path and unquoting the result; equivalent to JSON_UNQUOTE(JSON_EXTRACT()). 5.7.13 / Division operator := Assign a value = Assign a value (as part of a SET statement, or as part of the SET clause in ...
https://dev.mysql.com/doc/refman/5.7/en/outer-join-optimization.html
If there is a row in A that matches the WHERE clause, but there is no row in B that matches the ON condition, an extra B row is generated with all columns set to NULL. MySQL implements an A LEFT JOIN B join_specification as follows: Table B is set ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-maintenance.html
If you have deleted a large number of rows from a partition or if you have made many changes to a partitioned table with variable-length rows (that is, having VARCHAR, BLOB, or TEXT columns), you can use ALTER TABLE ... Only the values for the ... A ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-instance-tables.html
Each instance table has an EVENT_NAME or NAME column to indicate the instrument associated with each row. The mutex_instances.LOCKED_BY_THREAD_ID and rwlock_instances.WRITE_LOCKED_BY_THREAD_ID columns are extremely important for investigating ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-instrument-filtering.html
To control whether an instrument is enabled, set its ENABLED column to YES or NO. Setting the TIMED column affects Performance Schema table contents as described in Section 25.4.1, “Performance Schema Event Timing”. The setup_instruments table ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-instrument-naming.html
Idle Instrument Elements The idle instrument is used for idle events, which The Performance Schema generates as discussed in the description of the socket_instances.STATE column in Section 25.12.3.5, “The socket_instances Table”. Memory ... An ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-metadata-locks-table.html
The metadata_locks table has these columns: OBJECT_TYPE The type of lock used in the metadata lock subsystem. MySQL uses metadata locking to manage concurrent access to database objects and to ensure data consistency; see Section 8.11.4, ...