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https://dev.mysql.com/doc/refman/5.7/en/selecting-rows.html
Let's look at some selection queries in terms of questions about your pets that they answer. As shown in the preceding section, it is easy to retrieve an entire table. But typically you don't want to see the entire table, particularly when it ...
https://dev.mysql.com/doc/refman/5.7/en/server-loadable-functions.html
MySQL supports loadable functions, that is, functions that are not built in but can be loaded at runtime (either during startup or later) to extend server capabilities, or unloaded to remove capabilities. For a table describing the available ...
https://dev.mysql.com/doc/refman/5.7/en/server-plugins.html
MySQL supports an plugin API that enables creation of server plugins. Plugins can be loaded at server startup, or loaded and unloaded at runtime without restarting the server. The plugins supported by this interface include, but are not limited to, ...
https://dev.mysql.com/doc/refman/5.7/en/show-create-view.html
For example, you might use the ANSI SQL mode to ensure MySQL correctly interprets the standard SQL concatenation operator, the double bar (||), in your queries. SHOW CREATE VIEW view_name This statement shows the CREATE VIEW statement that creates ...
https://dev.mysql.com/doc/refman/5.7/en/stored-programs-defining.html
Each stored program contains a body that consists of an SQL statement. This statement may be a compound statement made up of several statements separated by semicolon (;) characters. For example, the following stored procedure has a body made up of ...
https://dev.mysql.com/doc/refman/5.7/en/sys-innodb-buffer-stats-by-schema.html
These views summarize the information in the INFORMATION_SCHEMA INNODB_BUFFER_PAGE table, grouped by schema. Warning Querying views that access the INNODB_BUFFER_PAGE table can affect performance. Do not query these views on a production system ...
https://dev.mysql.com/doc/refman/5.7/en/sys-innodb-buffer-stats-by-table.html
These views summarize the information in the INFORMATION_SCHEMA INNODB_BUFFER_PAGE table, grouped by schema and table. Warning Querying views that access the INNODB_BUFFER_PAGE table can affect performance. Do not query these views on a production ...
https://dev.mysql.com/doc/refman/5.7/en/system-schema.html
It contains tables that store information required by the MySQL server as it runs. Warning Do not convert MySQL system tables in the mysql database from MyISAM to InnoDB tables. If you do this, MySQL does not restart until you restore the old system ...
https://dev.mysql.com/doc/refman/5.7/en/type-conversion.html
When an operator is used with operands of different types, type conversion occurs to make the operands compatible. For example, MySQL automatically converts strings to numbers as necessary, and vice versa. mysql> SELECT 1+'1'; -> 2 mysql> SELECT ...
https://dev.mysql.com/doc/refman/5.7/en/using-spatial-indexes.html
The optimizer investigates whether available spatial indexes can be involved in the search for queries that use a function such as MBRContains() or MBRWithin() in the WHERE clause. The following query finds all objects that are in the given ...