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Database Forum / General DB Topics / DB Theory / July 2008

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How to show field that not being group?

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Lemune - 31 Jul 2008 03:51 GMT
Hi all.

I have this data:

id             GroupId             DDate                   Value
1                        1            7/31/2008                     5
2                        1            7/31/2008                     6
3                        1            7/31/2008                     2
4                        2            7/31/2008                     1
5                        2            7/31/2008                     2
6                        2            7/31/2008                     1

From this raw dataI want to show the data like this"
GroupId                  DDate                     TotalValue
1                            7/31/2008                            13
2                            7/31/2008                              4

current Query that I Use is

Select D.GroupId,(Select Top 1 DDate From MyTable Where
GroupId=D.GroupId)As DDate, Sum(D.Value) As TotalValue From MyTable D
Group By D.GroupId

But I want to remove the subquery, so my query will run faster.

Could it be done?

Thanks in Advanced
Bob Badour - 31 Jul 2008 04:11 GMT
> Hi all.
>
[quoted text clipped - 24 lines]
>
> Thanks in Advanced

Use the Max(...) aggregate function similar to the Sum(...) aggregate
you are already using.
Lemune - 31 Jul 2008 04:18 GMT
Thanks Bob.

It's work fine.
 
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