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https://dev.mysql.com/doc/refman/8.4/en/row-constructor-optimization.html
For example, these two statements are semantically equivalent: SELECT * FROM t1 WHERE (column1,column2) = (1,1); SELECT * FROM t1 WHERE column1 = 1 AND column2 = 1; In addition, the optimizer handles both expressions the same way. The optimizer is ...
https://dev.mysql.com/doc/refman/8.4/en/secure-client-programming.html
Client applications that access MySQL should use the following guidelines to avoid interpreting external data incorrectly or exposing sensitive information. Handle External Data Properly Handle MySQL Error Messages Properly Handle External Data ...
https://dev.mysql.com/doc/refman/8.4/en/selecting-columns.html
If you do not want to see entire rows from your table, just name the columns in which you are interested, separated by commas.
https://dev.mysql.com/doc/refman/8.4/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/8.4/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/8.4/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/8.4/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/8.4/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/8.4/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/8.4/en/thread-pool-elements.html
In older versions of MySQL, the monitoring tables were INFORMATION_SCHEMA tables (see Section 28.5, “INFORMATION_SCHEMA Thread Pool Tables”). The INFORMATION_SCHEMA tables are deprecated; expect them to be removed in a future version of MySQL.