Question

表：^{Sample table image}

PlayerID | PlayerName |Country
---------+------------+---------
1001     | Virat      | Ind
1001     | Virat      | USA
1002     | Dave       | Aus
1003     | Paul       | Ireland
1005     | Kapil      | Ind
1005     | Kapil      | Aus
1006     | Manoj      | NZ
1007     | Manish     | SA
1008     | Paul       | SriLanka
1008     | Paul       | SriLanka
1008     | Paul       | SriLanka
1004     | David      | SA
1005     | David      | SA

我想从给定的表中运行查询，找出代表多个国家/地区的PlayerIDs或PlayerNames。例如，PlayerID=1001代表了多个国家/地区，即“IND”和“USA”。此表中有一些重复的行，但请忽略它们。

Answer 1

我认为你的意思是：

SELECT PlayerID, PlayerName
FROM yourTable
GROUP BY PlayerID, PlayerName
HAVING COUNT(DISTINCT Country) > 1;

Answer 2

避免子查询，CTE，联接，交叉申请等 - 可以尝试像

这样的东西

SELECT Y.PlayerId, Y.PlayerName,COUNT(DISTINCT Y.Country) countriesPlayedFor
       FROM YourTable Y 
            GROUP BY Y.PlayerId, Y.PlayerName
                HAVING COUNT(DISTINCT Y.Country) > 1

Answer 3

这也将处理重复：

WITH CTE
AS (
    SELECT DISTINCT PlayerID
        ,PlayerName
        ,Country
    FROM dbo.PlayerCountries
    )
SELECT PlayerName
    ,COUNT(Country)
FROM CTE
GROUP BY PlayerName
HAVING COUNT(Country) > 1

查询以查找代表多个国家/地区的玩家

3 个答案: