SQL：“列'tbl.column'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。”

Question

我想知道为什么会出现以下错误：
Column 'tbl.column' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
当sql语句看起来像：
SELECT tbl.column, MAX(tblOther.columnOtherId) AS otherID FROM (tbl INNER JOIN tblOther ON tbl.columnId = tblOther.columnOtherId) INNER JOIN tblOtherAgain ON tblOther.columnOtherId = tblOtherAgain.columnAgainOtherId WHERE tblOther.columnOtherAgainId = @id

当我在tblOther.columnOtherId上删除聚合函数MAX时 ，我没有收到以上错误。 那么，如何在不出现所示错误的情况下使上面显示的语句起作用？

DBLibrary： Tedious.js

Answer 1

您使用了聚合函数MAX()并且SELECT子句中有一个未聚合的字段，这就是为什么需要使用GROUP BY子句的原因，

SELECT  tbl.column, 
        MAX(tblOther.columnOtherId) AS otherID 
FROM    (tbl INNER JOIN tblOther 
            ON tbl.columnId = tblOther.columnOtherId) 
        INNER JOIN tblOtherAgain 
            ON tblOther.columnOtherId = tblOtherAgain.SourceId 
WHERE   tblOther.columnOtherAgainId = @id
GROUP   BY tbl.column

Answer 2

SELECT tbl.column, MAX(tblOther.columnOtherId) AS otherID FROM (tbl INNER JOIN tblOther ON tbl.columnId = tblOther.columnOtherId) INNER JOIN tblOtherAgain ON tblOther.columnOtherId = tblOtherAgain.columnAgainOtherId WHERE tblOther.columnOtherAgainId = @id
GROUP BY tbl.column