mysql> grant select,insert,update,delete on cz_istester_com.* to istester@'%' identified by 'istester.com';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> grant select,insert,update,delete on cz_istester_com.* to istester@'%' identified by 'istester.com';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)