Sql 比较两个DW表之间的数据

我有点困惑。我正在测试DW中的一些数据质量问题，我需要知道一个表中的LOAN_SID是否与另一个表匹配。我使用了这个查询，但我不确定我是否正确，是否匹配，如果不匹配，就会出现问题。一切都很好

这就是问题所在：

(select count(LOAN_SID)  from DW_DW.AGG_LOAN_SS_MONTHLY
 minus
 select LOAN_SID from DW_DW.F_LOAN_UNWOUND_TRAN_DAILY) 
union all
( 
 select LOAN_SID  from DW_DW.F_LOAN_UNWOUND_TRAN_DAILY
 minus
 select LOAN_SID from DW_DW.AGG_LOAN_SS_MONTHLY
)

另一个是：

SELECT  LOAN_SID
FROM DW_DW.AGG_LOAN_SS_MONTHLY A  
WHERE not EXISTS (SELECT LOAN_SID 
                  FROM DW_DW.F_LOAN_UNWOUND_TRAN_DAILY B
                  WHERE A.LOAN_SID = B.LOAN_SID);

---

请帮忙

这将提供两个表中唯一的所有sid。这不是一个非常有效的查询，不应该在没有测试的情况下在大型表上运行

 select * from
( (select LOAN_SID, 'F_LOAN_UNWOUND_TRAN_DAILY' AS SOURCE  
 from DW_DW.F_LOAN_UNWOUND_TRAN_DAILY
 minus
 select LOAN_SID, 'AGG_LOAN_SS_MONTHLY'
 from DW_DW.AGG_LOAN_SS_MONTHLY)
UNION ALL
 ( select LOAN_SID, 'AGG_LOAN_SS_MONTHLY' AS SOURCE  
 from DW_DW.AGG_LOAN_SS_MONTHLY)
 minus
select LOAN_SID, 'F_LOAN_UNWOUND_TRAN_DAILY' 
 from DW_DW.F_LOAN_UNWOUND_TRAN_DAILY))

获取两个表中的SID

select a.LOAD_SID
from DW_DW.AGG_LOAN_SS_MONTHLY a, DW_DW.F_LOAN_UNWOUND_TRAN_DAILY b
where a.LOAN_SID = b.LOAN_SID;

---

谢谢你的帮助，我怎样才能得到两个表中相同的呢？