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https://dev.mysql.com/doc/refman/5.7/en/replication-snapshot-method.html
If the database on the source contains existing data it is necessary to copy this data to each replica. To select the appropriate method of dumping the database, choose between these options: Use the mysqldump tool to create a dump of all the ...
https://dev.mysql.com/doc/refman/5.7/en/explain-output.html
unique_subquery This type replaces eq_ref for some IN subqueries of the following form: value IN (SELECT primary_key FROM single_table WHERE some_expr) unique_subquery is just an index lookup function that replaces the subquery completely for better ... The EXPLAIN statement provides information about how MySQL executes ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-what-is-new-7-6.html
NDB 7.6 adds two tables to the ndbinfo information database to provide information about cluster nodes; these tables are listed here: config_nodes: This table the node ID, process type, and host name for each node listed in an NDB cluster's ... New ...
https://dev.mysql.com/doc/refman/5.7/en/charset-applications.html
If applications require data storage using a different character set or collation, you can configure character set information several ways: Specify character settings per database. For example, applications that use one database might use the ...
https://dev.mysql.com/doc/refman/5.7/en/grant-tables.html
The mysql system database includes several grant tables that contain information about user accounts and the privileges held by them. For information about other tables in the system database, see Section 5.3, “The mysql System Database”. The ...
https://dev.mysql.com/doc/refman/5.7/en/myisam-key-cache.html
To minimize disk I/O, the MyISAM storage engine exploits a strategy that is used by many database management systems. Otherwise, the server chooses a cache block buffer containing a different table index block (or blocks) and replaces the data ...
https://dev.mysql.com/doc/refman/5.7/en/version-tokens-usage.html
Suppose that a management application communicates with a set of servers that are queried by clients to access employee and product databases (named emp and prod, respectively). All servers are permitted to process data retrieval statements, but ...
https://dev.mysql.com/doc/refman/5.7/en/backup-types.html
Physical (Raw) Versus Logical Backups Physical backups consist of raw copies of the directories and files that store database contents. This type of backup is suitable for large, important databases that need to be recovered quickly when problems ...
https://dev.mysql.com/doc/refman/5.7/en/identifier-mapping.html
There is a correspondence between database and table identifiers and names in the file system. For the basic structure, MySQL represents each database as a directory in the data directory, and each table by one or more files in the appropriate ...
https://dev.mysql.com/doc/refman/5.7/en/create-table-select.html
You can precede the SELECT by IGNORE or REPLACE to indicate how to handle rows that duplicate unique key values. With REPLACE, new rows replace rows that have the same unique key value. If neither IGNORE nor REPLACE is specified, duplicate unique ...