同一列上的 T-SQL 两个 Where 子句

Question

在 SQL Server 2008 中，我有以下表格示例。

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为“具有以下所有属性的项目集”猫蒙皮。

Answer 2

其中任何一个都会产生您想要的输出：

SELECT * FROM Sample WHERE Num IN (10, 20)

或

SELECT * FROM Sample WHERE Num = 10 OR Num = 20

编辑：抱歉，这似乎不是您真正想要的。我相信这会起作用，但它不是很优雅：

SELECT * FROM Sample
WHERE Name IN (SELECT Name FROM Sample WHERE Num = 10)
  AND Name IN (SELECT Name FROM Sample WHERE Num = 20)

可能有更好的解决方案。很抱歉造成误会。

Answer 3

你可以试试这个

SELECT Name, Num
FROM MyTableSample s
WHERE Num in (10, 20)
    AND EXISTS
        (
        SELECT Name
        FROM MyTableSample s2
        WHERE s.name = s2.Name
            AND s.Num <> s2.Num
            AND s2.Num in (10, 20)
        )

Answer 4

试试这个

SELECT *
  FROM    (SELECT Name, Num FROM Sample WHERE Num = 10) A,
                    (SELECT Name, Num FROM Sample WHERE Num = 20) B
where A.nAME = B.nAME