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https://dev.mysql.com/doc/refman/8.0/en/time-zone-support.html
Note Named time zones can be used only if the time zone information tables in the mysql database have been created and populated. If your system has its own zoneinfo database (the set of files describing time zones), use the mysql_tzinfo_to_sql ...
https://dev.mysql.com/doc/refman/8.0/en/events-syntax.html
An event can be dropped by any user having the EVENT privilege for the database on which the event is defined. When a scheduled event is no longer wanted or needed, it can be deleted from the server by its definer using the DROP EVENT statement.
https://dev.mysql.com/doc/refman/8.0/en/merge-storage-engine.html
The underlying tables do not have to be in the same database as the MERGE table. Use of DROP TABLE with a MERGE table drops only the MERGE specification. The MERGE storage engine, also known as the MRG_MyISAM engine, is a collection of identical ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-limitations-limits.html
A DROP TABLE or TRUNCATE TABLE operation on an NDB table frees the memory that was used by this table for re-use by any NDB table, either by the same table or by another NDB table. These hard limits include: Database memory size and index memory ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-recovery.html
In some cases of database corruption, it is enough to dump, drop, and re-create one or a few corrupt tables. Recovery from Data Corruption or Disk Failure If your database becomes corrupted or disk failure occurs, you must perform the recovery using ...To achieve point-in-time recovery after restoring a backup, you can apply changes from the binary log that occurred after the backup was ...
https://dev.mysql.com/doc/refman/8.0/en/manual-info.html
This is the Reference Manual for the MySQL Database System, version 8.0, through release 8.0.45. Because this manual serves as a reference, it does not provide general instruction on SQL or relational database concepts. The MySQL Database Software ...Differences between minor versions of MySQL 8.0 are noted in the present text with reference to release numbers ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-table-characteristics.html
The name of the performance_schema database is lowercase, as are the names of tables within it. Many tables in the performance_schema database are read only and cannot be modified: mysql> TRUNCATE TABLE performance_schema.setup_instruments; ERROR ...Some of the setup tables have columns that can be modified to affect Performance Schema operation; some also permit rows to be inserted or ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-sql-statements.html
SELECT * FROM INFORMATION_SCHEMA.ENGINES [WHERE ENGINE LIKE 'NDB%'] This is the equivalent of SHOW ENGINES, but uses the ENGINES table of the INFORMATION_SCHEMA database. You can also query the tables in the ndbinfo information database for ... This ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-diskio.html
If you follow best practices for database design and tuning techniques for SQL operations, but your database is still slow due to heavy disk I/O activity, consider these disk I/O optimizations. If database write performance is an issue, conduct ...
https://dev.mysql.com/doc/refman/8.0/en/thread-commands.html
A thread can have any of the following Command values: Binlog Dump This is a thread on a replication source for sending binary log contents to a replica. Connect Used by replication receiver threads connected to the source, and by replication ...