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https://dev.mysql.com/doc/refman/8.0/en/mysql-tzinfo-to-sql.html
The mysql_tzinfo_to_sql program loads the time zone tables in the mysql database. It is used on systems that have a zoneinfo database (the set of files describing time zones). One likely location for these files is the /usr/share/zoneinfo directory ...
https://dev.mysql.com/doc/refman/8.0/en/retrieving-data.html
The SELECT statement is used to pull information from a table. The general form of the statement is: SELECT what_to_select FROM which_table WHERE conditions_to_satisfy; what_to_select indicates what you want to see. This can be a list of columns, ...If it is present, conditions_to_satisfy specifies one or more conditions that rows must satisfy to qualify for ...
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-table-lock-waits.html
For additional information, see the description of the Performance Schema metadata_locks table at Section 29.12.13.3, “The metadata_locks Table”. The schema_table_lock_waits and x$schema_table_lock_waits views have these columns: object_schema ... These views display which sessions are blocked waiting on metadata locks, and what is blocking ...
https://dev.mysql.com/doc/refman/8.0/en/constraint-foreign-key.html
MySQL supports ON UPDATE and ON DELETE foreign key references in CREATE TABLE and ALTER TABLE statements. Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL ...The available referential actions are RESTRICT, CASCADE, SET NULL, and NO ACTION (the ...
https://dev.mysql.com/doc/refman/8.0/en/data-dictionary-file-removal.html
ddl_log.log file: The file contained records of metadata operations generated by data definition statements such as DROP TABLE and ALTER TABLE. Unless otherwise noted, data previously stored in metadata files is now stored in data dictionary tables.
https://dev.mysql.com/doc/refman/8.0/en/faqs-views.html
What happens to a view if an underlying table is dropped or renamed? After a view has been created, it is possible to drop or alter a table or view to which the definition refers. What happens to a view if an underlying table is dropped or renamed? ...Can you insert into views that are based on joins? ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-read-only-instance.html
The same restriction applies to any operation that modifies data dictionary tables, such as ANALYZE TABLE and ALTER TABLE tbl_name ENGINE=engine_name. You can query InnoDB tables where the MySQL data directory is on read-only media by enabling the ...How to Enable To prepare an instance for read-only operation, make sure all the necessary information is flushed to the data files before storing it on the read-only ...
https://dev.mysql.com/doc/refman/8.0/en/keywords.html
Certain keywords, such as SELECT, DELETE, or BIGINT, are reserved and require special treatment for use as identifiers such as table and column names. Reserved words are permitted as identifiers if you quote them as described in Section 11.2, ...
https://dev.mysql.com/doc/refman/8.0/en/show-warnings.html
Warnings are generated for DML statements such as INSERT, UPDATE, and LOAD DATA as well as DDL statements such as CREATE TABLE and ALTER TABLE. The ALTER TABLE statement produces three warning messages (strict SQL mode is disabled for the example to ...mysql> CREATE TABLE t1 (a TINYINT NOT NULL, b CHAR(4)); Query OK, 0 rows affected (0.05 sec) mysql> INSERT INTO t1 VALUES(10,'mysql'), (NULL,'test'), (300,'xyz'); Query OK, 3 rows affected, 3 warnings (0.00 sec) Records: 3 Duplicates: 0 Warnings: 3 mysql> SHOW WARNINGS\G ...
https://dev.mysql.com/doc/refman/8.0/en/access-control.html
For example: SHOW GRANTS FOR 'joe'@'office.example.com'; SHOW GRANTS FOR 'joe'@'home.example.com'; Internally, the server stores privilege information in the grant tables of the mysql system database. The MySQL server reads the contents of these ...