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https://dev.mysql.com/doc/refman/8.0/en/subquery-restrictions.html
In general, you cannot modify a table and select from the same table in a subquery. For example, this limitation applies to statements of the following forms: DELETE FROM t WHERE ... FROM t ...); Exception: The preceding prohibition does not apply ...
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-auto-increment-columns.html
This indicates how much of the sequence of values is “used up.” . This view indicates which tables have AUTO_INCREMENT columns and provides information about those columns, such as the current and maximum column values and the usage ratio ...
https://dev.mysql.com/doc/refman/8.0/en/uninstall-component.html
As a result, unloaded components are not loaded during the startup sequence for subsequent server restarts. A component provides services that are available to the server and other components; see Section 7.5, “MySQL Components”. It requires the ...
https://dev.mysql.com/doc/refman/8.0/en/unix-signal-response.html
Some command interpreters associate certain key sequences with signals, such as Control+C to send a SIGINT signal. On Unix and Unix-like systems, a process can be the recipient of signals sent to it by the root system account or the system account ...
https://dev.mysql.com/doc/refman/8.0/en/window-function-optimization.html
The optimizer processes multiple windows that have the same ordering requirements in sequence, so sorting can be skipped for windows following the first one. Window functions affect the strategies the optimizer considers: Derived table merging for ...
https://dev.mysql.com/doc/refman/8.0/en/account-locking.html
MySQL supports locking and unlocking user accounts using the ACCOUNT LOCK and ACCOUNT UNLOCK clauses for the CREATE USER and ALTER USER statements: When used with CREATE USER, these clauses specify the initial locking state for a new account. In ...
https://dev.mysql.com/doc/refman/8.0/en/alter-logfile-group.html
You can verify that the UNDO files were created and obtain information about them by querying the Information Schema FILES table. ALTER LOGFILE GROUP logfile_group ADD UNDOFILE 'file_name' [INITIAL_SIZE [=] size] [WAIT] ENGINE [=] engine_name This ...
https://dev.mysql.com/doc/refman/8.0/en/analyze-table.html
The sampling-rate value in the HISTOGRAM column of the Information Schema COLUMN_STATISTICS table can be queried to determine the fraction of data that was sampled to create the histogram. row *************************** Table: employees.employees ...ANALYZE [NO_WRITE_TO_BINLOG | LOCAL] TABLE tbl_name UPDATE HISTOGRAM ON col_name [, col_name] ...
https://dev.mysql.com/doc/refman/8.0/en/backup-methods.html
You can also create a binary backup simply by copying the table files, as long as the server is not updating anything. Making Delimited-Text File Backups To create a text file containing a table's data, you can use SELECT * INTO OUTFILE 'file_name' ...Making a Hot Backup with MySQL Enterprise Backup Customers of MySQL Enterprise Edition can use the MySQL Enterprise Backup product to do physical backups of entire instances or selected databases, tables, or ...
https://dev.mysql.com/doc/refman/8.0/en/backup-types.html
Logical backups save information represented as logical database structure (CREATE DATABASE, CREATE TABLE statements) and content (INSERT statements or delimited-text files). This type of backup is suitable for smaller amounts of data where you ...