Question

我想回答以下问题。我需要选择在Track列中收听了track 1和track 2的用户。出于某种原因，我完全迷失了如何做到这一点。

Answer 1

您可以计算每个用户收听的相关曲目的数量：

SELECT   user_id
FROM     mytable
WHERE    track IN ('track_1', 'track_2')
GROUP BY user_id
HAVING   COUNT(DISTINCT track) = 2

Answer 2

以下是其中一种方式：

SELECT user_id from TABLE_NAME 
WHERE track = 'track_1' AND 
           user_id IN 
           (SELECT user_id from TABLE_NAME where track = 'track_2');

Answer 3

如果只有两个，你也可以使用GROUP BY和HAVING：

SELECT user_id
FROM t
GROUP BY user_id
HAVING COUNT(DISTINCT track) > 1

Answer 4

可能比需要存在子查询的地方更简单。

Select userID
from yourtable
where Track in ('Track 1','Track 2')
group by userid
having count(1) = 2

Answer 5

这有效吗？

SELECT UserId
FROM YourTable
WHERE Track in ('track_1','track_2')
group by UserId
Having  count(distinct Track) > 1;

如何从同一列中选择满足2个要求的用户

5 个答案: