Question

我正在使用ROW_NUMBER（）和派生表从派生表结果中获取数据。

但是，我收到错误消息，告诉我在GROUP BY子句中没有相应的列。

这是错误：

列'tblCompetition.objID'在选择列表中无效，因为它不包含在聚合函数或GROUP BY子句中

我错过了什么专栏？或者我做错了什么？在下面查找不起作用的查询，以及正在运行的（更简单）查询。

SQL Server 2008。

查询不起作用：

SELECT
    objID,
    objTypeID,
    userID,
    datAdded,
    count,
    sno
FROM
(
    SELECT scc.objID,scc.objTypeID,scc.userID,scc.datAdded,
       COUNT(sci.favID) as count,
    ROW_NUMBER() OVER(PARTITION BY scc.userID ORDER BY scc.unqID DESC) as sno 
    FROM tblCompetition scc
    LEFT JOIN tblFavourites sci
    ON sci.favID = scc.objID
        AND sci.datTimeStamp BETWEEN @datStart AND @datEnd
) as t
WHERE sno <= 2 AND objTypeID = @objTypeID
   AND datAdded BETWEEN @datStart AND @datEnd
GROUP BY objID,objTypeID,userID,datAdded,count,sno

正在运行的简单查询：

SELECT objId,objTypeID,userId,datAdded FROM
(
        SELECT objId,objTypeID,userId,datAdded,
    ROW_NUMBER() OVER(PARTITION BY userId ORDER BY unqid DESC) as sno 
        FROM tblResdagbokenCompetition
) as t
WHERE sno<=2 AND objtypeid=@objTypeID
    AND datAdded BETWEEN @datStart AND @datEnd

谢谢！

Answer 1

你不能在group by子句中计算。实际上，当您在group by中有其他字段时，会计算计数。从您的分组中删除计数。

Answer 2

在您使用的最里面的查询中

COUNT(sci.favID) as count,

这是一个聚合，您可以选择其他非聚合列。

我相信你想要一个分析COUNT代替：

SELECT  objID,
        objTypeID,
        userID,
        datAdded,
        count,
        sno
FROM    (
        SELECT  scc.objID,scc.objTypeID,scc.userID,scc.datAdded,
                COUNT(sci.favID) OVER (PARTITION BY scc.userID ) AS count,
                ROW_NUMBER() OVER (PARTITION BY scc.userID ORDER BY scc.unqID DESC) as sno 
        FROM    tblCompetition scc
        LEFT JOIN
                tblFavourites sci
        ON      sci.favID = scc.objID
                AND sci.datTimeStamp BETWEEN @datStart AND @datEnd
        ) as t
WHERE   sno  = 1
        AND objTypeID = @objTypeID

Answer 3

你的子查询中需要GROUP BY，因为聚合的位置是：

SELECT
objID,
objTypeID,
userID,
datAdded,
count,
sno
FROM
(
SELECT scc.objID,scc.objTypeID,scc.userID,scc.datAdded,
   COUNT(sci.favID) as count,
ROW_NUMBER() OVER(PARTITION BY scc.userID ORDER BY scc.unqID DESC) as sno 
FROM tblCompetition scc
LEFT JOIN tblFavourites sci
ON sci.favID = scc.objID
    AND sci.datTimeStamp BETWEEN @datStart AND @datEnd
GROUP BY scc.objID,scc.objTypeID,scc.userID,scc.datAdded) as t
WHERE sno <= 2 AND objTypeID = @objTypeID
AND datAdded BETWEEN @datStart AND @datEnd

使用派生表时，列无效错误

3 个答案: