delete syntax

[Tim Dunphy]

hello list,

 I am attempting to delete a user from the mysql.user table  without success.

  mysql> delete from mysql.user where user='mail_admin@%';
Query OK, 0 rows affected (0.00 sec)
 

 mysql> select user,host from mysql.user where user='mail_admin';
+------------+-----------------------+
| user       | host                  |
+------------+-----------------------+
| mail_admin | %                     |



 I would appreciate any advice you may have.

 Regards,
Tim