use "sum" aggregate function as criteria

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use "sum" aggregate function as criteria

sumit kende

SSC Veteran

Points: 272
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November 19, 2008 at 3:02 am

#196549

Hello,
I have the following table:
tempTable
Id TmePeriod
1 5
2 10
3 4
4 8
5 7
In this I want the top records untill the sum of Time Period exceeds 20.
so the output is
Select * from tempTable where (Criteria needed)
Id TmePeriod
1 5
2 10
3 4
4 8
without usig cursor. Can single query give above result?

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Vic.K SSC Eights! Points: 970 More actions · Answer 1

You can achieve this with following query:

Select *

From tempTable

Where ID <=

(

select MIN(ID)

from tempTable T1

Where

(

select Sum(TmePeriod) from tempTable T2 Where T2.ID <= T1.ID

) > 20

)

But I'm not sure, this is the most efficient way to do this.

ChrisM@Work SSC Guru Points: 186127 More actions · Answer 2

Can you UPDATE tempTable? If so, you could use the running totals solution:

http://www.sqlservercentral.com/articles/Advanced+Querying/61716/

Cheers

ChrisM

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