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https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-files-table.html
The Information Schema FILES table provides metadata about all InnoDB tablespace types including file-per-table tablespaces, general tablespaces, the system tablespace, temporary table tablespaces, and undo tablespaces (if present). For more ...
https://dev.mysql.com/doc/refman/8.0/en/myisam-optimization.html
To coalesce fragmented rows and eliminate wasted space that results from deleting or updating rows, run myisamchk in recovery mode: $> myisamchk -r tbl_name You can optimize a table in the same way by using the OPTIMIZE TABLE SQL statement.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-server-operations.html
The server_operations table contains entries for all ongoing NDB operations that the current SQL node (MySQL Server) is currently involved in. It effectively is a subset of the cluster_operations table, in which operations for other SQL and API ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-transporters.html
In NDB 8.0.37 and later, you can obtain similar information about individual transporters from the transporter_details table. This information is shown in the table's status column, which can have any one of the following values: CONNECTING, ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-select-count.html
ndb_select_count prints the number of rows in one or more NDB tables. With a single table, the result is equivalent to that obtained by using the MySQL statement SELECT COUNT(*) FROM tbl_name. Usage ndb_select_count [-c connection_string] -ddb_name ...--connect-retries Command-Line Format --connect-retries=# Type Integer Default Value 12 Minimum Value 0 Maximum Value 12 Number of times to retry connection before giving ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-create-select.html
If the destination table does not exist, logging occurs as follows. ROW format: The statement is logged as a CREATE TABLE statement followed by a series of insert-row events. This includes the case that the destination table exists and IF NOT EXISTS ...SELECT always performs an implicit commit (Section 15.3.3, “Statements That Cause an Implicit ...
https://dev.mysql.com/doc/refman/8.0/en/ansi-diff-select-into-table.html
For example: INSERT INTO tbl_temp2 (fld_id) SELECT tbl_temp1.fld_order_id FROM tbl_temp1 WHERE tbl_temp1.fld_order_id > 100; Alternatively, you can use SELECT ... The same syntax can also be used inside stored routines using cursors and local ...
https://dev.mysql.com/doc/refman/8.0/en/firewall-information-schema-tables.html
The following sections describe the INFORMATION_SCHEMA tables associated with MySQL Enterprise Firewall (see Section 8.4.7, “MySQL Enterprise Firewall”). These tables are available only if the appropriate firewall plugins are enabled.
https://dev.mysql.com/doc/refman/8.0/en/general-information-schema-tables.html
The following sections describe what may be denoted as the “general” set of INFORMATION_SCHEMA tables. These are the tables not associated with particular storage engines, components, or plugins.
https://dev.mysql.com/doc/refman/8.0/en/information-schema-administrable-role-authorizations-table.html
The ADMINISTRABLE_ROLE_AUTHORIZATIONS table (available as of MySQL 8.0.19) provides information about which roles applicable for the current user or role can be granted to other users or roles. The ADMINISTRABLE_ROLE_AUTHORIZATIONS table has these ...GRANTEE The user name part of the account to which the role is ...