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https://dev.mysql.com/doc/refman/8.4/en/partitioning-limitations-partitioning-keys-unique-keys.html
The rule governing this relationship can be expressed as follows: All columns used in the partitioning expression for a partitioned table must be part of every unique key that the table may have. In other words, every unique key on the table must ...
https://dev.mysql.com/doc/refman/8.4/en/with.html
CTEs are similar to tables created with CREATE [TEMPORARY] TABLE but need not be defined or dropped explicitly. A common table expression (CTE) is a named temporary result set that exists within the scope of a single statement and that can be ...
https://dev.mysql.com/doc/refman/8.4/en/myisamchk-table-info.html
To obtain a description of a MyISAM table or statistics about it, use the commands shown here. myisamchk -d tbl_name Runs myisamchk in “describe mode” to produce a description of your table. If you start the MySQL server with external locking ...The output from these commands is explained later in this ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-disk-data-objects.html
Create a tablespace; assign the log file group, as well as one or more data files, to the tablespace. Create a Disk Data table that uses this tablespace for data storage. Now we can create a tablespace—an abstract container for files used by Disk ... NDB Cluster Disk Data storage is implemented using the following objects: Tablespace: Acts as containers for other Disk Data ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-compression-tuning.html
For example: USE test; SET GLOBAL innodb_file_per_table=1; SET GLOBAL autocommit=0; -- Create an uncompressed table with a million or two rows. \! ls -l data/test/big_table.ibd CREATE TABLE key_block_size_4 LIKE big_table; ALTER TABLE ...However, ...
https://dev.mysql.com/doc/refman/8.4/en/join.html
MySQL supports the following JOIN syntax for the table_references part of SELECT statements and multiple-table DELETE and UPDATE statements: table_references: escaped_table_reference [, escaped_table_reference] ... A table reference (when it refers ...index_hint: { USE {INDEX|KEY} [FOR {JOIN|ORDER BY|GROUP BY}] ([index_list]) | {IGNORE|FORCE} {INDEX|KEY} [FOR {JOIN|ORDER BY|GROUP BY}] (index_list) } index_list: index_name [, index_name] ...
https://dev.mysql.com/doc/refman/8.4/en/select.html
You cannot use FOR UPDATE as part of the SELECT in a statement such as CREATE TABLE new_table SELECT ... (If you attempt to do so, the statement is rejected with the error Can't update table 'old_table' while 'new_table' is being created.) FOR SHARE ...[into_option] [FROM table_references [PARTITION partition_list]] [WHERE where_condition] [GROUP BY [ {col_name | expr | position}, ... SELECT [ALL | DISTINCT | DISTINCTROW ] [HIGH_PRIORITY] ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-ndbinfo-memory-per-fragment.html
memory_per_fragment Table: Notes memory_per_fragment Table: Examples The memory_per_fragment table provides information about the usage of memory by individual fragments. See the Notes later in this section to see how you can use this to find out ...This is true as long as all data nodes are running and connected to the cluster; for a data node that is missing, there are no rows for the fragment replicas that it ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-option-tables.html
ndb-default-column-format: Use this value (FIXED or DYNAMIC) by default for COLUMN_FORMAT and ROW_FORMAT options when creating or adding table columns. ndb_read_backup: Enable read from any replica for all NDB tables; use NDB_TABLE=READ_BACKUP={0|1} ...ndb-distribution: Default distribution for new tables in NDBCLUSTER (KEYHASH or LINHASH, default is ... The following list includes command-line options, system ...
https://dev.mysql.com/doc/mysql-cluster-manager/8.4/en/mcm-attribute-tables-mysqld.html
ndb-default-column-format: Use this value (FIXED or DYNAMIC) by default for COLUMN_FORMAT and ROW_FORMAT options when creating or adding table columns. ndb_read_backup: Enable read from any replica for all NDB tables; use NDB_TABLE=READ_BACKUP={0|1} ...ndb-distribution: Default distribution for new tables in NDBCLUSTER (KEYHASH or LINHASH, default is ...