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https://dev.mysql.com/doc/refman/8.0/en/replace.html
When modifying an existing table that is not partitioned to accommodate partitioning, or, when modifying the partitioning of an already partitioned table, you may consider altering the table's primary key (see Section 26.6.1, “Partitioning Keys, ...| TABLE table_name} value: {expr | DEFAULT} value_list: value [, value] ... REPLACE [LOW_PRIORITY | DELAYED] [INTO] tbl_name [PARTITION (partition_name [, partition_name] ...)] ...
https://dev.mysql.com/doc/refman/8.0/en/creating-many-tables.html
If you have many MyISAM tables in the same database directory, open, close, and create operations are slow. If you execute SELECT statements on many different tables, there is a little overhead when the table cache is full, because for every table ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-connection-control-failed-login-attempts-table.html
This table provides information about the current number of consecutive failed connection attempts per account (user/host combination). Notes The CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS plugin must be activated for this table to be available, and ...CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS has these columns: USERHOST The user/host combination indicating an account that has failed connection attempts, in 'user_name'@'host_name' ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-engines-table.html
The ENGINES table has these columns: ENGINE The name of the storage engine. SUPPORT The server's level of support for the storage engine, as shown in the following table. This is particularly useful for checking whether a storage engine is ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-mysql-firewall-users-table.html
The MYSQL_FIREWALL_USERS table provides a view into the in-memory data cache for MySQL Enterprise Firewall. It is used in conjunction with the mysql.firewall_users system table that provides persistent storage of firewall data; see MySQL Enterprise ...It lists names and operational modes of registered firewall account ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-mysql-firewall-whitelist-table.html
The MYSQL_FIREWALL_WHITELIST table provides a view into the in-memory data cache for MySQL Enterprise Firewall. It is used in conjunction with the mysql.firewall_whitelist system table that provides persistent storage of firewall data; see MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-plugins-table.html
The PLUGINS table has these columns: PLUGIN_NAME The name used to refer to the plugin in statements such as INSTALL PLUGIN and UNINSTALL PLUGIN. For plugins installed with INSTALL PLUGIN, the PLUGIN_NAME and PLUGIN_LIBRARY values are also registered ...PLUGIN_STATUS The plugin status, one of ACTIVE, INACTIVE, DISABLED, DELETING, or ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-profiling-table.html
The table is empty unless the profiling session variable is set to 1. Note This table is deprecated; expect it to be removed in a future MySQL release. The PROFILING table has these columns: QUERY_ID A numeric statement identifier. Its contents ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-referential-constraints-table.html
The REFERENTIAL_CONSTRAINTS table has these columns: CONSTRAINT_CATALOG The name of the catalog to which the constraint belongs. CONSTRAINT_SCHEMA The name of the schema (database) to which the constraint belongs. UNIQUE_CONSTRAINT_CATALOG The name ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-schemata-table.html
A schema is a database, so the SCHEMATA table provides information about databases. The SCHEMATA table has these columns: CATALOG_NAME The name of the catalog to which the schema belongs. Caution Because any static global privilege is considered a ...The following statements are equivalent: SELECT SCHEMA_NAME AS `Database` FROM INFORMATION_SCHEMA.SCHEMATA [WHERE SCHEMA_NAME LIKE 'wild'] SHOW DATABASES [LIKE 'wild'] You see only those databases for which you have some kind of privilege, unless you have the global SHOW DATABASES ...