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https://dev.mysql.com/doc/refman/5.7/en/optimizing-subqueries.html
For example: SELECT * FROM t1 WHERE t1.column1 IN (SELECT column1 FROM t2 ORDER BY column1); SELECT * FROM t1 WHERE t1.column1 IN (SELECT DISTINCT column1 FROM t2); SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t2 LIMIT 1); Replace a join with a ...
https://dev.mysql.com/doc/refman/5.7/en/replication-gtids-auto-positioning.html
GTIDs replace the file-offset pairs previously required to determine points for starting, stopping, or resuming the flow of data between source and replica. The correct approach to recover from this situation is for the replica to replicate the ...
https://dev.mysql.com/doc/refman/5.7/en/shared-key-cache.html
Multiple sessions can initiate requests that result in cache block replacements, as long as they do not interfere with each other (that is, as long as they need different index blocks, and thus cause different cache blocks to be replaced). Threads ...
https://dev.mysql.com/doc/refman/5.7/en/string-functions-charset.html
The same applies for INSTR(), LCASE(), LOWER(), LTRIM(), MID(), REPEAT(), REPLACE(), REVERSE(), RIGHT(), RPAD(), RTRIM(), SOUNDEX(), SUBSTRING(), TRIM(), UCASE(), and UPPER(). Note The REPLACE() function, unlike all other functions, always ignores ... MySQL has many operators and functions that return a ...
https://dev.mysql.com/doc/refman/5.7/en/sys-format-path.html
Given a path name, returns the modified path name after replacing subpaths that match the values of the following system variables, in order: datadir tmpdir slave_load_tmpdir innodb_data_home_dir innodb_log_group_home_dir innodb_undo_directory ...
https://dev.mysql.com/doc/refman/5.7/en/traceable-statements.html
Statements which are traceable are listed here: SELECT INSERT REPLACE UPDATE DELETE EXPLAIN with any of the preceding statements SET DO DECLARE, CASE, IF, and RETURN as used in stored routines CALL Tracing is supported for both INSERT and REPLACE ...For statements which are prepared and executed in separate steps, preparation and execution are traced ...
https://dev.mysql.com/doc/refman/5.7/en/replication-options-replica.html
--replicate-do-db=db_name Command-Line Format --replicate-do-db=name Type String Creates a replication filter using the name of a database. Tell the replication SQL thread to restrict replication to statements where the default database (that is, ...
https://dev.mysql.com/doc/refman/5.7/en/replication-options-binary-log.html
If it does, the relative part of the path is replaced with the absolute path set using the --log-bin option. Only those statements are written to the binary log where the default database (that is, the one selected by USE) is db_name. To specify ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-replication-schema.html
ndb_apply_status Table ndb_binlog_index Table ndb_replication Table Replication in NDB Cluster makes use of a number of dedicated tables in the mysql database on each MySQL Server instance acting as an SQL node in both the cluster being replicated ...This is true regardless of whether the replica is a single server or a ...
https://dev.mysql.com/doc/refman/5.7/en/features.html
This section describes some of the important characteristics of the MySQL Database Software. This is useful if you want to provide an SQL interface for an in-house database. Support for DELETE, INSERT, REPLACE, and UPDATE to return the number of ...