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https://dev.mysql.com/doc/refman/9.7/en/getting-information.html
What if you forget the name of a database or table, or what the structure of a given table is (for example, what its columns are called)? MySQL addresses this problem through several statements that provide information about the databases and ...
https://dev.mysql.com/doc/refman/9.7/en/information-schema-libraries-table.html
LAST_ALTERED Most recent date and time that the library was altered. This is a set consisting of none or any one or more of the following: REAL_AS_FLOAT, PIPES_AS_CONCAT, ANSI_QUOTES, IGNORE_SPACE, ONLY_FULL_GROUP_BY, NO_UNSIGNED_SUBTRACTION, ...
https://dev.mysql.com/doc/refman/9.7/en/information-schema-routines-table.html
DATETIME_PRECISION For stored function temporal return values, the fractional seconds precision. LAST_ALTERED The date and time when the routine was last modified. The ROUTINES table provides information about stored routines (stored procedures and ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-page-compression.html
During recovery, updated pages are written out in an uncompressed form. InnoDB supports page-level compression for tables that reside in file-per-table tablespaces. Page compression is enabled by specifying the COMPRESSION attribute with CREATE ...
https://dev.mysql.com/doc/refman/9.7/en/insert.html
| TABLE table_name | VALUES row_constructor_list } [ON DUPLICATE KEY UPDATE assignment_list] value: {expr | DEFAULT} value_list: value [, value] ... INSERT with an ON DUPLICATE KEY UPDATE clause enables existing rows to be updated if a row to be ...
https://dev.mysql.com/doc/refman/9.7/en/json-attribute-functions.html
The functions in this section return attributes of JSON values. An error occurs if the argument is not a valid JSON document. An empty array, empty object, or scalar value has depth 1. A nonempty array containing only elements of depth 1 or ...
https://dev.mysql.com/doc/refman/9.7/en/keyring-okv-plugin.html
For example: STANDBY_SERVER=host_ip:port_num,host_ip:port_num,host_ip:port_num,host_ip:port_num Ensure that the list of standby servers is kept short, accurate, and up to date, and servers that are no longer valid are removed. For example: ... Note ...
https://dev.mysql.com/doc/refman/9.7/en/lateral-derived-tables.html
A derived table cannot normally refer to (depend on) columns of preceding tables in the same FROM clause. A derived table may be defined as a lateral derived table to specify that such references are permitted. Nonlateral derived tables are ...
https://dev.mysql.com/doc/refman/9.7/en/myisamchk-table-info.html
If you start the MySQL server with external locking disabled, myisamchk may report an error for a table that is updated while it runs. This may be updated after a table is loaded (or greatly changed) with myisamchk -a. If this is not updated at all, ... To obtain a description of a MyISAM table or statistics about it, use the commands shown ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-disk-data-objects.html
Once table ts_1 has been created as shown, you can perform INSERT, SELECT, UPDATE, and DELETE statements on it just as you would with any other MySQL table. NDB Cluster Disk Data storage is implemented using the following objects: Tablespace: Acts ...