SQLServer两张表筛选相同数据和不同数据

select distinct A.ID from  A where A.ID not in (select ID from B)

select A.ID from A left join B on A.ID=B.ID where B.ID is null

select * from  B  where (select count(1) as num from A where A.ID = B.ID) = 0

SELECT * FROM b WHERE NOT EXISTS(SELECT 1 FROM a WHERE a.ID=b.ID)

--相同数据
select tel_no  from a
intersect
select tel_no from b

--不同数据
select tel_no  from b
except
select tel_no from a

原文地址：https://www.cnblogs.com/Jerrycjc/p/8516246.html