New events are defined using the CREATE EVENT statement. See Section 21.2.1, “CREATE EVENT Syntax”.

The definition of an existing event can be changed by means of the ALTER EVENT statement. See Section 21.2.2, “ALTER EVENT Syntax”.

When a scheduled event is no longer wanted or needed, it can be deleted from the server by its definer using the DROP EVENT statement. See Section 21.2.3, “DROP EVENT Syntax”. (Whether an event persists past the end of its schedule also depends on its ON COMPLETION clause, if it has one. See Section 21.2.1, “CREATE EVENT Syntax”.)

An event can be deleted by a user other than its definer, but in this case, the user performing the the deletion must have the necessary privileges on the mysql.event table. See Section 21.4, “The Event Scheduler and MySQL Privileges”.