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https://dev.mysql.com/doc/refman/8.4/en/getting-information.html
You can obtain the CREATE TABLE statement necessary to create an existing table using the SHOW CREATE TABLE statement. 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 ...You have previously seen SHOW DATABASES, which lists the databases managed by the ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-page-compression.html
Page compression is enabled by specifying the COMPRESSION attribute with CREATE TABLE or ALTER TABLE. Enabling Page Compression To enable page compression, specify the COMPRESSION attribute in the CREATE TABLE statement. For example: CREATE TABLE t1 ... InnoDB supports page-level compression for tables that reside in file-per-table ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-optimization.html
Some INFORMATION_SCHEMA tables contain columns that provide table statistics: STATISTICS.CARDINALITY TABLES.AUTO_INCREMENT TABLES.AVG_ROW_LENGTH TABLES.CHECKSUM TABLES.CHECK_TIME TABLES.CREATE_TIME TABLES.DATA_FREE TABLES.DATA_LENGTH ...Selecting ...
https://dev.mysql.com/doc/ndbapi/en/ndb-foreignkey.html
This section provides information about the ForeignKey class, which models a foreign key on an NDB table. ForeignKey Class Overview ForeignKey() ForeignKey::FkAction ForeignKey::getName() ForeignKey::getParentTable() ForeignKey::getChildTable() ...
https://dev.mysql.com/doc/refman/8.4/en/request-access.html
This is where the privilege columns in the grant tables come into play. These privileges can come from any of the user, global_grants, db, tables_priv, columns_priv, or procs_priv tables. (You may find it helpful to refer to Section 8.2.3, “Grant ... After the server accepts a connection, it enters Stage 2 of access ...
https://dev.mysql.com/doc/refman/8.4/en/replication-options-binary-log.html
For example, DDL statements such as CREATE TABLE and ALTER TABLE are always logged as statements, without regard to the logging format in effect, so the following statement-based rules for --binlog-do-db always apply in determining whether or not ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-best-practices.html
Run the server with the --sql_mode=NO_ENGINE_SUBSTITUTION option to prevent tables from being created with storage engines that you do not want to use. Specify a primary key for every table using the most frequently queried column or columns, or an ...Adding foreign keys ensures that referenced columns are indexed, which can improve ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-ndbinfo-blobs.html
The part and inline sizes of NDB blob columns can be set using CREATE TABLE and ALTER TABLE statements containing NDB table column comments (see NDB_COLUMN Options); this can also be done in NDB API applications (see Column::setPartSize() and ...For ...
https://dev.mysql.com/doc/refman/8.4/en/optimizing-innodb-storage-layout.html
Once your data reaches a stable size, or a growing table has increased by tens or some hundreds of megabytes, consider using the OPTIMIZE TABLE statement to reorganize the table and compact any wasted space. The reorganized tables require less disk ...This is a straightforward technique that can improve performance when other techniques such as improving index usage or tuning application code are not ...
https://dev.mysql.com/doc/refman/8.4/en/cost-model.html
The primary key for the server_cost table is the cost_name column, so it is not possible to create multiple entries for any cost estimate. The server recognizes these cost_name values for the server_cost table: disk_temptable_create_cost, ...These ... To generate execution plans, the optimizer uses a cost model that is based on estimates of the cost of various operations that occur during query ...