查找某两列重复sql

SELECT  * from RMPSY_XQRMPSY t1 ,RMPSY_XQRMPSY t2 where t1.juror_id=t2.juror_id AND
t1.ah=t2.ah GROUP BY t1.juror_id,t1.ah HAVING count(*)>=2

其中juror_id 和ah不是主键