sql选择计数> 1的记录,其中至少有一条记录具有值

Question

我试图让所有参与者在表中有超过1条记录,其中至少有一条记录的IsCurrent = 0且IsActive = 1

这是我到目前为止,但它不起作用:

    SELECT  ParticipantId 
    FROM Contact
    WHERE (IsCurrent = 0 AND IsActive = 1 AND ContactTypeId = 1)
    Group by ParticipantId
    Having COUNT(ParticipantId) > 1

此查询返回与该描述匹配的记录,但我需要与该描述匹配的所有记录,还有更多.

Answer 1

您可以使用EXISTS:

SELECT  ParticipantId 
FROM    Contact
WHERE   EXISTS
        (   SELECT  1
            FROM    Contact c2
            WHERE   c2.ParticipantID = c.ParticipantId
            AND     ContactTypeId = 1
            GROUP BY ParticipantID
            HAVING COUNT(*) > 1
            AND COUNT(CASE WHEN IsCurrent = 0 AND IsActive = 1 THEN 1 END) >= 1
        );