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https://dev.mysql.com/doc/refman/5.7/en/charset-errors.html
If character_set_results has a value of NULL or binary, no conversion occurs. This section describes how the MySQL server uses character sets for constructing error messages. For information about the language of error messages (rather than the ...
https://dev.mysql.com/doc/refman/5.7/en/charset-metadata.html
If character_set_results is set to NULL, no conversion is performed and the server returns metadata using its original character set (the set indicated by character_set_system). Metadata is “the data about the data.” Anything that describes the ...
https://dev.mysql.com/doc/refman/5.7/en/charset-unicode-utf32.html
The utf32 character set is fixed length (like ucs2 and unlike utf16). utf32 uses 32 bits for every character, unlike ucs2 (which uses 16 bits for every character), and unlike utf16 (which uses 16 bits for some characters and 32 bits for others).
https://dev.mysql.com/doc/refman/5.7/en/create-procedure.html
Its initial value is NULL within the procedure, and its value is visible to the caller when the procedure returns. By default, a stored routine is associated with the default database. To associate the routine explicitly with a given database, ...
https://dev.mysql.com/doc/refman/5.7/en/create-view.html
If the view does not exist, CREATE OR REPLACE VIEW is the same as CREATE VIEW. If the view does exist, CREATE OR REPLACE VIEW replaces it. For information about restrictions on view use, see Section 23.9, “Restrictions on Views”. The ...
https://dev.mysql.com/doc/refman/5.7/en/data-masking-usage.html
Before using MySQL Enterprise Data Masking and De-Identification, install it according to the instructions provided at Section 6.5.2, “Installing or Uninstalling MySQL Enterprise Data Masking and De-Identification”. To use MySQL Enterprise Data ...
https://dev.mysql.com/doc/refman/5.7/en/declare-local-variable.html
If the DEFAULT clause is missing, the initial value is NULL. type [DEFAULT value] This statement declares local variables within stored programs. To provide a default value for a variable, include a DEFAULT clause. The value can be specified as an ...
https://dev.mysql.com/doc/refman/5.7/en/delete.html
For example, to delete rows that exist in t1 that have no match in t2, use a LEFT JOIN: DELETE t1 FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.id IS NULL; The syntax permits .* after each tbl_name for compatibility with Access. DELETE is a DML ...
https://dev.mysql.com/doc/refman/5.7/en/diagnostics-area.html
SQL statements produce diagnostic information that populates the diagnostics area. Standard SQL has a diagnostics area stack, containing a diagnostics area for each nested execution context. Standard SQL also supports GET STACKED DIAGNOSTICS syntax ...
https://dev.mysql.com/doc/refman/5.7/en/drop-database.html
If the default database is dropped, the default database is unset (the DATABASE() function returns NULL). DROP {DATABASE | SCHEMA} [IF EXISTS] db_name DROP DATABASE drops all tables in the database and deletes the database. Be very careful with ...