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https://dev.mysql.com/doc/refman/8.0/en/optimizer-hints.html
One means of control over optimizer strategies is to set the optimizer_switch system variable (see Section 10.9.2, “Switchable Optimizations”). Changes to this variable affect execution of all subsequent queries; to affect one query differently ...
https://dev.mysql.com/doc/refman/8.0/en/charset-collation-coercibility.html
In the great majority of statements, it is obvious what collation MySQL uses to resolve a comparison operation. For example, in the following cases, it should be clear that the collation is the collation of column x: SELECT x FROM T ORDER BY x; ...
https://dev.mysql.com/doc/refman/8.0/en/information-functions.html
It may be used to time how quickly MySQL processes the expression. The result value is 0, or NULL for inappropriate arguments such as a NULL or negative repeat count. The intended use is from within the mysql client, which reports query execution ...
https://dev.mysql.com/doc/refman/8.0/en/alter-table-examples.html
For NDB tables, it is also possible to change the storage type used for a table or column. row *************************** Table: t1 Create Table: CREATE TABLE `t2` ( `c1` int(11) DEFAULT NULL ) /*!50100 TABLESPACE ts_1 STORAGE DISK */ ...
https://dev.mysql.com/doc/refman/8.0/en/audit-log-reference.html
Unless those objects are installed, the audit_log plugin operates in legacy mode (deprecated in MySQL 8.0.34). Audit Log Tables MySQL Enterprise Audit uses tables in the mysql system database for persistent storage of filter and user account data.
https://dev.mysql.com/doc/refman/8.0/en/charset-applications.html
For applications that store data using the default MySQL character set and collation (utf8mb4, utf8mb4_0900_ai_ci), no special configuration should be needed. If applications require data storage using a different character set or collation, you ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf8.html
utf8 has been used by MySQL in the past as an alias for the utf8mb3 character set, but this usage is now deprecated; in MySQL 8.0, SHOW statements and columns of INFORMATION_SCHEMA tables display utf8mb3 instead. For more information, see Section ...
https://dev.mysql.com/doc/refman/8.0/en/create-table-gipks.html
Beginning with MySQL 8.0.30, MySQL supports generated invisible primary keys for any InnoDB table that is created without an explicit primary key. When the sql_generate_invisible_primary_key server system variable is set to ON, the MySQL server ...
https://dev.mysql.com/doc/refman/8.0/en/fulltext-search-ngram.html
The built-in MySQL full-text parser uses the white space between words as a delimiter to determine where words begin and end, which is a limitation when working with ideographic languages that do not use word delimiters. To address this limitation, ...
https://dev.mysql.com/doc/refman/8.0/en/invisible-columns.html
An invisible column is normally hidden to queries, but can be accessed if explicitly referenced. As an illustration of when invisible columns may be useful, suppose that an application uses SELECT * queries to access a table, and must continue to ...