CREATE USER 'jeffrey'@'localhost' IDENTIFIED BY 'my pass';

DROP USER 'jeffrey'@'localhost';

GRANT ALL PRIVILEGES ON *.* TO 'jeffrey'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION

REVOKE INSERT ON *.* FROM 'jeffrey'@'localhost';
REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'jeffrey'@'localhost';

RENAME USER 'jeffrey'@'localhost' TO 'jeff'@'127.0.0.1';

SET PASSWORD = PASSWORD('mypass');
SET PASSWORD FOR 'jeffrey'@'localhost' = PASSWORD('mypass');