Question

我有以下代码不断抛出此错误：

子查询返回了多个值。当子查询遵循=，！=，<，<=，>，> =或将子查询用作表达式时，不允许这样做。

代码：

SELECT (SELECT SumOfAmount 
        FROM (SELECT SUM(Proposals.Amount) AS SumOfAmount
            FROM Proposals
            WHERE Proposals.EstCloseDate Between DATEADD(YEAR,-0, GETDATE()) AND DATEADD(MONTH, +12, GETDATE()) 
            GROUP BY Proposals.SalesRep, Proposals.ProposalStatus
            HAVING Proposals.ProposalStatus = 3) Proposals
            ), 
        (SELECT SumOfEstAmount
        FROM (SELECT Sum(Prospects.EstAmount) AS SumOfEstAmount
            FROM Prospects
            WHERE Prospects.ProspectStatus = 1  AND 
            Prospects.EstProposalDate BETWEEN DATEADD(YEAR,-0, DATEADD(MONTH, 1, GETDATE())) AND DATEADD(YEAR,+12, DATEADD(MONTH, 0, GETDATE())) 
            GROUP BY Prospects.SalesRep) Proposals
            )   

FROM Proposals
INNER JOIN SalesRep ON Proposals.SalesRep = SalesRep.SalesRepID
INNER JOIN Prospects ON Proposals.Amount = Prospects.EstAmount
GROUP BY Prospects.SalesRep, Proposals.SalesRep, Proposals.ProposalStatus,Proposals.Amount

Answer 1

由于在子选择中使用了GROUP BY，因此在主查询的选择列表中将获得多行。

使用CASE仅对某些值求和，而不是使用子选择。

df["column"].fillna(0, inplace=True)

另外，由于要求和，请勿按df.loc["column"].fillna(0, inplace=True)分组。也加入SELECT SUM(CASE WHEN P1.ProposalStatus = 3 AND P1.EstCloseDate Between DATEADD(YEAR,-0, GETDATE()) AND DATEADD(MONTH, +12, GETDATE()) THEN P1.Amount ELSE 0 END) AS SumOfAmount, SUM(CASE WHEN P2.ProspectStatus = 1 AND P2.EstProposalDate BETWEEN DATEADD(YEAR,-0, DATEADD(MONTH, 1, GETDATE())) AND DATEADD(YEAR,+12, DATEADD(MONTH, 0, GETDATE())) THEN P2.EstAmount ELSE 0 END) AS SumOfEstAmount FROM Proposals P1 INNER JOIN SalesRep S ON P1.SalesRep = S.SalesRepID INNER JOIN Prospects P2 ON P1.Amount = P2.EstAmount GROUP BY P2.SalesRep, P1.SalesRep, P1.ProposalStatus看起来很奇怪；但是，我不知道您到底想要实现什么。

Answer 2

关键答案是“前1名”。如果您使用子查询，则应在其中使用前1个

您如何编写sql代码以接受子查询中的聚合函数？

2 个答案: