sql server select查询一列是相同的，另一列是不同的

Question

我希望能够在表中找到一列相同而另一列不同的事件。

示例表：

id    team    week
1     1       1
1     2       1
2     2       1
2     1       2

我想要一个查询，找到团队不同的所有ID，但周仍然是相同的，所以像团队这样的东西不等于团队，但是周等于一周。

基本上我想知道在同一周内是否有任何ID改变了球队，我该怎么做？

Answer 1

SELECT 
    t1.id, 
    t1.week
FROM 
    YourTable t1
    JOIN YourTable t2 
        ON t1.ID = t2.ID
        AND t1.team < t2.team
        AND t1.week = t2.week

Answer 2

SELECT ID
, COUNT(DISTINCT TEAM) AS CNT_TEAM
, COUNT(DISTINCT WEEK) AS CNT_WEEK
FROM TABLENAME
GROUP BY ID
HAVING COUNT(DISTINCT TEAM) > 1
AND COUNT(DISTINCT WEEK) = 1

Answer 3

像这样的东西？

SELECT distinct id
FROM TeamWeek
GROUP BY id, week
HAVING Count(team) > 1