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sql server 2008 - Derived Table SUM (Aggregate)

Posted on 2014-10-04
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Last Modified: 2014-11-03
Hello Experts,
Can you please look at this and give me a solution. I don't want to change this format of the derived table as I have tons created same way but want to aggregate result of both sums like this
SUM ( A1.CM_Sales + B1.YTD_Sales) AS 'Total Sales'  -> I want to sum result of both the derived tables


SELECT a1.Sto_Name,
       CM_Count,
       CM_Sales,
       YTD_Count,
       YTD_Sales
FROM (SELECT b.Sto_Name,
             COUNT(*) AS CM_Count,
             SUM(Sal_Amt) AS CM_Sales
      FROM Sales a
      JOIN Stores b ON a.Sto_ID = b.Sto_ID
      WHERE DATEPART(yy,Sal_Date) = DATEPART(yy,@RunDate) AND
            DATEPART(mm,Sal_Date) = (DATEPART(mm,@RunDate)-1)
      GROUP BY b.Sto_Name) AS A1

JOIN (SELECT Sto_Name,
             COUNT(*) AS YTD_Count,
             SUM(Sal_Amt) AS YTD_Sales
      FROM Sales a
      JOIN Stores b ON a.Sto_ID = b.Sto_ID
      WHERE DATEPART(yy,Sal_Date) = DATEPART(yy,@RunDate)
      GROUP BY b.Sto_Name) AS B1  ON a1.Sto_Name = b1.Sto_Name
0
Comment
Question by:BI 0824
  • 2
  • 2
4 Comments
 
LVL 49

Expert Comment

by:PortletPaul
ID: 40361832
Are you sure you want to add the Year To Date with Current Month? (normally YTD already includes CM)

That could double count the current month.

Are you certain DATEPART(mm,Sal_Date) = (DATEPART(mm,@RunDate)-1) will always work correctly?
(what happens if @RunDate is in Januarury?)

And, are you sure you don't want to simplify, e.g.

SELECT
      Sto_Name
    , COUNT(CASE WHEN DATEPART(mm, Sal_Date) = (DATEPART(mm, @RunDate) - 1) THEN a.Sto_ID_ID END)  AS CM_Count
    , SUM(CASE WHEN DATEPART(mm, Sal_Date) = (DATEPART(mm, @RunDate) - 1) THEN Sal_Amt ELSE 0 END) AS CM_Sales
    , COUNT(*)                                                                                     AS YTD_Count
    , SUM(Sal_Amt)                                                                                 AS YTD_Sales
FROM Sales a
      JOIN Stores b
                  ON a.Sto_ID = b.Sto_ID
WHERE DATEPART(yy, Sal_Date) = DATEPART(yy, @RunDate)
GROUP BY
      b.Sto_Name
;

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Author Comment

by:BI 0824
ID: 40362129
The one given is not mine I mean the query but all the queries I need to deal with r the same like example given. So I just need to know how to sum both the values in the given format
0
 
LVL 49

Accepted Solution

by:
PortletPaul earned 2000 total points
ID: 40362722
Whether they are yours or not isn't the issue - if you add those 2 numbers together the result will be wrong

The existing query will not work in January either.

Are you really determined to get a query that gives you bad results?

Here is how you would add those 2 numbers together:
All you need to do is place the calculation into the select clause, but you don't need SUM()

SELECT a1.Sto_Name,
       CM_Count,
       CM_Sales,
       YTD_Count,
       YTD_Sales,
       A1.CM_Sales + B1.YTD_Sales AS 'Total Sales' --<< BUT THIS IS A BAD NUMBER
FROM (
0
 

Author Closing Comment

by:BI 0824
ID: 40420881
Sorry about the late reply. It worked for me the way you did. Thanks.
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