SQLServer两张表筛选相同数据和不同数据

方法一：

copy

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

方法二：

copy

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

方法三：

copy

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

方法四：

copy

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

 

方法五：

copy

--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