Max of Sums query....

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May 1st, 2008, 09:13 AM

nmajdan

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Query - General - Max of Sums query....

Need help with a query. Imagine the following table:

tblExample
ID...Comp...Date.......Value
1....A......1/1/08.....17
2....A......1/1/08.....22
3....A......1/1/08.....19
4....A......1/2/08.....22
5....A......1/2/08.....25
6....A......1/3/08.....15
7....B......1/1/08.....31
8....B......1/1/08.....30
9....B......1/2/08.....28
10...B......1/3/08.....33

What I need is a way to sum each company for each day and then take the max of those sums. For instance, taking the sums of the above companies for each day would yield:

Comp...Date.....Value
A......1/1/08...58
A......1/2/08...47
A......1/3/08...15
B......1/1/08...61
B......1/2/08...28
B......1/3/08...33

Then, I would need to take the max of these values. So, the overall result of the query should look like this:

Comp...Date.....max(value)
A......1/1/08...58
B......1/1/08...61

The range is going to specified by the user, but for that given range, I need to sum the values for each day and then take the max and return the day(s) the max occurred and what the max was for each company.
Any help would be appreciated.

May 1st, 2008, 09:57 AM

mehere

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try something like this:

sql Code:

Original - sql Code
select comp, dt, sum(value) as value from tblExample as t1 group by comp, dt having sum(value) = (select max(value) from (select sum(value) as value from tblExample where comp = t1.comp group by dt) as t)

SELECT comp, dt, SUM(value) AS value
FROM tblExample AS t1
GROUP BY comp, dt
HAVING SUM(value) = 
    (SELECT MAX(value) FROM
        (SELECT SUM(value) AS value
        FROM tblExample
        WHERE comp = t1.comp
        GROUP BY dt) AS t)

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