CREATE TABLE user_value
(`user_name` varchar(4), `user_pass` varchar(3))
;
select * from user_value;
select * from user_value WHERE user_name='admin_email\' AND (SELECT CASE WHEN (SUBSTRING(admin_pass,1,1) = \'a\') THEN SLEEP(5) ELSE 1 END) AND \'1\' = \'1' AND user_pass='pass\' --'