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https://dev.mysql.com/doc/refman/5.7/en/update.html
UPDATE is a DML statement that modifies rows in a table. Single-table syntax: UPDATE [LOW_PRIORITY] [IGNORE] table_reference SET assignment_list [WHERE where_condition] [ORDER BY ...] [LIMIT row_count] value: {expr | DEFAULT} assignment: col_name = ...The SET clause indicates which columns to modify and the values they should be ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-page-compression.html
Page compression is enabled by specifying the COMPRESSION attribute with CREATE TABLE or ALTER TABLE. For example: CREATE TABLE t1 (c1 INT) COMPRESSION="zlib"; You can also enable page compression in an ALTER TABLE statement. ALTER TABLE t1 ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-analyze-table-complexity.html
To set the number of pages sampled for an individual table, use the STATS_SAMPLE_PAGES option with CREATE TABLE or ALTER TABLE. ANALYZE TABLE complexity for InnoDB tables is dependent on: The number of pages sampled, as defined by ...Note ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-privilege-distribution.html
After the copies are created, mysql_cluster_move_privileges invokes mysql_cluster_move_grant_tables, which contains the ALTER TABLE ... Normally, each MySQL server's user privilege tables in the mysql database must use the MyISAM storage engine, ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-temp-table-info.html
INNODB_TEMP_TABLE_INFO provides information about user-created InnoDB temporary tables that are active in the InnoDB instance. It does not provide information about internal InnoDB temporary tables used by the optimizer. mysql> SHOW TABLES FROM ...
https://dev.mysql.com/doc/refman/5.7/en/drop-table.html
Be careful with this statement! For each table, it removes the table definition and all table data. If the table is partitioned, the statement removes the table definition, all its partitions, all data stored in those partitions, and all partition ...They are permitted to make porting easier from other database ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-threads-table.html
The threads table contains a row for each server thread. When the Performance Schema initializes, it populates the threads table based on the threads in existence then. The INSTRUMENTED and HISTORY column values for new threads are determined by ...
https://dev.mysql.com/doc/refman/5.7/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, db, tables_priv, columns_priv, or procs_priv tables. (You may find it helpful to refer to Section 6.2.3, “Grant Tables”, ...
https://dev.mysql.com/doc/refman/5.7/en/symbolic-links-to-tables.html
For InnoDB tables, use the alternative technique explained in Section 14.6.1.2, “Creating Tables Externally” instead. The same is true for the ALTER TABLE, OPTIMIZE TABLE, and REPAIR TABLE statements. These table symlink operations are not ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-index-stat.html
ndb_index_stat provides per-fragment statistical information about indexes on NDB tables. sampleCount can be compared with the cardinality of SHOW INDEX or INFORMATION_SCHEMA.STATISTICS, although the latter two provide a view of the table as a ...