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https://dev.mysql.com/doc/refman/5.7/en/checksum-table.html
[QUICK | EXTENDED] CHECKSUM TABLE reports a checksum for the contents of a table. You can use this statement to verify that the contents are the same before and after a backup, rollback, or other operation that is intended to put the data back to a ...
https://dev.mysql.com/doc/refman/5.7/en/create-table-secondary-indexes.html
A secondary index defined on a virtual column is sometimes referred to as a “virtual index”. A secondary index may be created on one or more virtual columns or on a combination of virtual columns and regular columns or stored generated columns.
https://dev.mysql.com/doc/refman/5.7/en/create-trigger.html
CREATE [DEFINER = user] TRIGGER trigger_name trigger_time trigger_event ON tbl_name FOR EACH ROW [trigger_order] trigger_body trigger_time: { BEFORE | AFTER } trigger_event: { INSERT | UPDATE | DELETE } trigger_order: { FOLLOWS | PRECEDES } ...
https://dev.mysql.com/doc/refman/5.7/en/disk-issues.html
This section describes ways to configure storage devices when you can devote more and faster storage hardware to the database server. For information about optimizing an InnoDB configuration to improve I/O performance, see Section 8.5.8, ...
https://dev.mysql.com/doc/refman/5.7/en/engine-condition-pushdown-optimization.html
This optimization improves the efficiency of direct comparisons between a nonindexed column and a constant. In such cases, the condition is “pushed down” to the storage engine for evaluation. This optimization can be used only by the NDB ...
https://dev.mysql.com/doc/refman/5.7/en/events-overview.html
MySQL Events are tasks that run according to a schedule. When you create an event, you are creating a named database object containing one or more SQL statements to be executed at one or more regular intervals, beginning and ending at a specific ...
https://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html
To investigate database page corruption, you might dump your tables from the database with SELECT ... Usually, most of the data obtained in this way is intact. Serious corruption might cause SELECT * FROM tbl_name statements or InnoDB background ...
https://dev.mysql.com/doc/refman/5.7/en/functions.html
Expressions can be used at several points in SQL statements, such as in the ORDER BY or HAVING clauses of SELECT statements, in the WHERE clause of a SELECT, DELETE, or UPDATE statement, or in SET statements. Expressions can be written using values ...
https://dev.mysql.com/doc/refman/5.7/en/general-tablespaces.html
A general tablespace is a shared InnoDB tablespace that is created using CREATE TABLESPACE syntax. The server keeps tablespace metadata in memory for the lifetime of a tablespace. Multiple tables in fewer general tablespaces consume less memory for ...
https://dev.mysql.com/doc/refman/5.7/en/get-diagnostics.html
GET [CURRENT | STACKED] DIAGNOSTICS { statement_information_item [, statement_information_item] ... (You can also use SHOW WARNINGS or SHOW ERRORS to see conditions or errors.) No special privileges are required to execute GET DIAGNOSTICS. The ...