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https://dev.mysql.com/doc/refman/8.0/en/sys-table-exists.html
Parameters in_db VARCHAR(64): The name of the database in which to check for table existence. in_table VARCHAR(64): The name of the table to check the existence of. Tests whether a given table exists as a regular table, a TEMPORARY table, or a view. If both a temporary and a permanent table exist with the given name, TEMPORARY is ...
https://dev.mysql.com/doc/refman/8.0/en/alter-table-partition-operations.html
Partitioning-related clauses for ALTER TABLE can be used with partitioned tables for repartitioning, to add, drop, discard, import, merge, and split partitions, and to perform partitioning maintenance. Simply using a partition_options clause with ...
https://dev.mysql.com/doc/refman/8.0/en/audit-log-installation.html
This section describes how to install or uninstall MySQL Enterprise Audit, which is implemented using the audit log plugin and related elements described in Section 8.4.5.1, “Elements of MySQL Enterprise Audit”. For general information about ...
https://dev.mysql.com/doc/refman/8.0/en/bnl-bka-optimization.html
In MySQL, a Batched Key Access (BKA) Join algorithm is available that uses both index access to the joined table and a join buffer. The BKA algorithm supports inner join, outer join, and semijoin operations, including nested outer joins. Benefits ...
https://dev.mysql.com/doc/refman/8.0/en/built-in-function-reference.html
The following table lists each built-in (native) function and operator and provides a short description of each one. For a table listing functions that are loadable at runtime, see Section 14.2, “Loadable Function Reference”. ->> Return value ...
https://dev.mysql.com/doc/refman/8.0/en/cache-index.html
| tbl_name PARTITION (partition_list) } IN key_cache_name tbl_index_list: tbl_name [{INDEX|KEY} (index_name[, index_name] ...)] partition_list: { partition_name[, partition_name] ... | ALL } The CACHE INDEX statement assigns table indexes to a ...
https://dev.mysql.com/doc/refman/8.0/en/call.html
CALL sp_name([parameter[,...]]) CALL sp_name[()] The CALL statement invokes a stored procedure that was defined previously with CREATE PROCEDURE. Stored procedures that take no arguments can be invoked without parentheses. CALL can pass back values ...
https://dev.mysql.com/doc/refman/8.0/en/case-sensitivity.html
For nonbinary strings (CHAR, VARCHAR, TEXT), string searches use the collation of the comparison operands. For binary strings (BINARY, VARBINARY, BLOB), comparisons use the numeric values of the bytes in the operands; this means that for alphabetic ...
https://dev.mysql.com/doc/refman/8.0/en/charset-repertoire.html
The repertoire of a character set is the collection of characters in the set. String expressions have a repertoire attribute, which can have two values: ASCII: The expression can contain only ASCII characters; that is, characters in the Unicode ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf8mb3.html
For example: CREATE TABLE t (s1 CHAR(1)) CHARACTER SET utf8mb3; SELECT * FROM t WHERE s1 COLLATE utf8mb3_general_ci = 'x'; DECLARE x VARCHAR(5) CHARACTER SET utf8mb3 COLLATE utf8mb3_danish_ci; SELECT CAST('a' AS CHAR CHARACTER SET utf8mb4) COLLATE ... The utf8mb3 character set has these characteristics: Supports BMP characters only (no support for supplementary characters) Requires a maximum of three bytes per multibyte ...