mysql> select md5(concat((select md5("admin123") from test limit 1),'`xx')) from test; +------------------------------------------------------------------+ | md5(concat((select md5("admin123") from test limit 1),'`1qazx')) | +------------------------------------------------------------------+ | 18575bf7ee87ae4277cbcec02b9a2645 | | 18575bf7ee87ae4277cbcec02b9a2645 | | 18575bf7ee87ae4277cbcec02b9a2645 | +------------------------------------------------------------------+ 3 rows in set (0.00 sec)