Oracle查詢重復字段

查詢某個字段有重復的數據:

　　select org_id from oa_food_yy group by org_id having count(*)>1

查詢某些字段有重復的數據:

　　select org_id,food_id from oa_food_yy group by org_id,food_id having count(*)>1

　　select * from oa_food_yy where (org_id,food_id) in (select org_id,food_id from oa_food_yy group by org_id,food_id having count(*)>1)