Sql 使用派生表时出现列无效错误

我使用ROW_NUMBER和一个派生表从派生表结果中获取数据

但是，我收到一条错误消息，告诉我GROUPBY子句中没有相应的列

以下是错误：

列“TBLComption.objID”在选择列表中无效，因为它既不包含在聚合函数中，也不包含在GROUP BY子句中

我缺了什么栏目？还是我做错了什么？在下面查找不工作的查询，以及正在工作的更简单的查询

SQL Server 2008

不起作用的查询：

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

---

谢谢大家!

在GROUPBY子句中不能有count。事实上，当group by中有其他字段时，将导出计数。在您使用的最内层查询中，按从组中删除计数。

COUNT(sci.favID) as count,

它是一个聚合，您可以选择其他非聚合列

我相信你想要的是分析计数：

---

在子查询中需要GROUP BY，因为这是聚合的位置：

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

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