Add Sequence Number within group

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Transact-SQL (2008)

Add Sequence Number within group

Author

Topic

scabral7
Yak Posting Veteran

57 Posts

Posted - 2013-10-13 : 20:52:02

Hi,

I have the following data:

POL# POL_EFF_DATE
123 1-1-2012
123 1-1-2012
123 1-1-2012
123 1-1-2013
123 1-1-2013
456 1-1-2012
456 1-1-2012
456 1-1-2013
456 1-1-2013

I want to add sequence number to each group with same Pol# and Effective Date like this:

POL# POL_EFF_DATE Seq
123 1-1-2012 1
123 1-1-2012 1
123 1-1-2012 1
123 1-1-2013 2
123 1-1-2013 2
456 1-1-2012 1
456 1-1-2012 1
456 1-1-2013 2
456 1-1-2013 2

is there a set based function to accomplish this in SQL 2008?

thanks
Scott

VeeranjaneyuluAnnapureddy
Posting Yak Master

169 Posts

Posted - 2013-10-14 : 01:07:11

Declare @Table Table (POL# int,POL_EFF_DATE varchar(20))

insert @Table
Select 123,'1-1-2012'
union all Select 123,'1-1-2012'
union all Select 123,'1-1-2012'
union all Select 123,'1-1-2013'
union all Select 123,'1-1-2013'
union all Select 456,'1-1-2012'
union all Select 456,'1-1-2012'
union all Select 456,'1-1-2013'
union all Select 456,'1-1-2013'

Select *,Dense_Rank() Over (Partition By POL_EFF_DATE Order by POL#) AS Seq From @Table

veeranjaneyulu

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2013-10-14 : 01:54:21

it should be


Select *,Dense_Rank() Over (Partition By [POL#] Order by POL_EFF_DATE) AS Seq From @Table

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs

scabral7
Yak Posting Veteran

57 Posts

Posted - 2013-10-14 : 12:42:40

thanks visakh16,

that worked!

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