Access 2010 SQL-通过交叉表查询中的聚合函数对行进行排序

Question

I want to see a SUM (Transform Spending) for each of my rows (Category) and pivoted by another field (Media_Type). The code below works fine for this, except for the ORDER BY clause, which I added because I want my output rows to be ordered by the total spending for each row.

TRANSFORM  Sum([Spending])

SELECT     [Category],
           SUM([Spending])
FROM       [Data]
GROUP BY   [Category]
ORDER BY   SUM([Spending]) DESC

PIVOT      [Media_Type] IN ("TV","Print","Internet")
;

When I add the ORDER BY command, I get the error: 'Cannot have aggregate function in ORDER BY clause'. How can I work around this and group my rows by and aggregate?

Answer 1

This article suggests that your SQL should work, an alternative (but by no means great) option would be to move your query into the FROM part of another query eg

SELECT 
    * 
FROM (
    -- Your Query Here (but you'll have to name the SUM column) --
) x 
ORDER BY 
    columnName DESC` 

I'm guessing Access doesn't have the OVER clause available in SQL Server which could potentially be used otherwise.

Answer 2

TRANSFORM  Sum([Spending]) 

SELECT [Category], SUM([Spending]) as sum FROM [Data] GROUP BY [Category] ORDER BY sum DESC

PIVOT [Media_Type] IN ("TV","Print","Internet") ;