T-SQL Two Where子句在同一列上

Question

在SQL Server 2008中,我有下面的表示例.

Name   Num
----------
John    20
John    30
Peter   10
Peter   20
Peter   30
Marry   20
Marry   30
Mike    10
Mike    20
Mike    30
Phil    10
Phil    30

我想要Num = 10和Num = 20的记录.查询将返回

Name   Num
----------
Peter   10
Peter   20
Mike    10
Mike    20

非常感谢.

Answer 1

你想要这样的东西:

SELECT Name, Num
FROM tbl
WHERE Name IN (
    SELECT Name FROM tbl
    WHERE Num IN (10, 20)
    GROUP BY Name 
    HAVING COUNT(*) = 2 -- Must have all items in the set of 2
)
AND Num IN (10, 20) -- still need to restrict, since the set is not maximal

但是还有其他方法可以将"具有以下所有属性的项目集"设置为"猫".