DROP USER user [, user] ...

The DROP USER statement removes one or more MySQL accounts. It removes privilege rows for the account from all grant tables. To use this statement, you must have the global CREATE USER privilege or the DELETE privilege for the mysql database. Each account is named using the same format as for the GRANT statement; for example, 'jeffrey'@'localhost'. If you specify only the username part of the account name, a hostname part of '%' is used. For additional information about specifying account names, see Section 13.5.1.3, “GRANT Syntax”.

With DROP USER, you can remove an account and its privileges as follows:

DROP USER user;

Important: DROP USER does not automatically close any open user sessions. Rather, in the event that a user with an open session is dropped, the statement does not take effect until that user's session is closed. Once the session is closed, the user is dropped, and that user's next attempt to log in will fail. This is by design.

DROP USER does not automatically delete or invalidate any database objects that the user created. This applies to tables, views, stored routines, triggers, and events.