存储过程中未返回的行

Question

我在dbo.Members中有两行，但是我的存储过程未返回计数。我可以像SELECT COUNT(*) FROM dbo.Members WHERE MemberID = 1234一样运行查询，并将计数返回为2，这是正确的。

为什么它不会返回存储过程中的行？

SELECT 
    ValidCount, 
    InvalidCount, 
    (SELECT COUNT(*) FROM dbo.Members WHERE MemberID = @pMemberID) AS 'TotalMembers' 

FROM 
    dbo.Reporting 
WHERE 
    MemberID = @pMemberID 

Answer 1

可能是因为你没有在Reporting项与MemberId = 1234。

试试这个：

SELECT COALESCE(validCount, 0) AS validCount, 
     COALESCE(invalidCount, 0) AS invalidCount, 
     (
     SELECT COUNT(*) 
     FROM members m 
     WHERE m.memberId = p.memberId 
     ) AS totalMembers 
FROM (
     SELECT @pMemberId AS memberId 
     ) p 
LEFT JOIN 
     reporting r 
ON  r.memberId = p.memberId