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 Transact-SQL (2008)
 Please HELP - adding counter
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zoe2003
Starting Member

17 Posts

Posted - 11/07/2012 :  07:13:57  Show Profile  Reply with Quote
Hi,

I need to add a counter for each change in 2 columns like following:
this is the original table :
column1 column2
1 2
1 2
1 3
1 4
1 5
2 10
2 11
2 12
2 15
2 20

and I want a 3rd column like following:
column1 column2 counter
1 2 1
1 2 2
1 3 3
1 4 4
1 5 5
2 10 1
2 11 2
2 12 3
2 15 4
2 20 5


Thanks,
Z.

stepson
Aged Yak Warrior

Romania
545 Posts

Posted - 11/07/2012 :  07:22:03  Show Profile  Reply with Quote
select *
,ROW_NUMBER () OVER ( PARTITION BY column1 order by column1 ) as column3
from A

What you mean when You say "for each change in 2 columns" ?

the exemple shown by you , only the change in column 1

Edited by - stepson on 11/07/2012 07:28:25
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zoe2003
Starting Member

17 Posts

Posted - 11/07/2012 :  07:32:00  Show Profile  Reply with Quote
Thanks a lot !
This is what I needed.
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stepson
Aged Yak Warrior

Romania
545 Posts

Posted - 11/07/2012 :  07:45:38  Show Profile  Reply with Quote
w. welcome
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