Grouping SQL Data

I have a problem I can't get my head round I have a datatable containing the following fields Region, id, loaddescription , dateadded and I need to create a results set that gives me the latest added item for each region, the region order is not important but if it can be added great..

Typical data
id Region  dateadded            Description
1    2           02/02/11 12:00      xyz
2    1           02/02/11 11:00      abc
3    3           10/02/11 10:00      xyz2
4    3           10/02/11 11:00      grt
5    4           11/02/11  05:00      xyz1
6    2           11/02/11  06:00      xyzabc
7    1           11/02/11  09:00      qwerty
8    1           11/02/11 11:00


So what I'm after is a resultsset that based on the above data looks like this (I've ommitted the description  column for clarity.)

Region   id  dateadded description
1            8   11/02/11 11:00
2            6   11/02/11 06:00
3            4   10/02/11 11:00
4            5   11/02/11 05:00

There are in total 17 regions and potentiallly thousands of records

HELP!

Mark
markejAsked:
Who is Participating?
 
LowfatspreadConnect With a Mentor Commented:
which version /edition of sql server are you using?

OVER is only available from sql 2005 onwards....

why have you included oracle as a zone?

select a.*
  from yourtable as A
 where not exists (select id from yourtable as x
                           where a.region=x.region
                            and a.dateadded<x.dateadded
                            and a.id < x.id)
 order by a.region,a.id
     
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Naveen KumarProduction Manager / Application Support ManagerCommented:
select *
from (
select region, id, dateadded ,
row_number() over ( partition by region order by dateadded desc ) rr
from your_table )
where rr = 1;
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Naveen KumarConnect With a Mentor Production Manager / Application Support ManagerCommented:
try this if you want description as well :

select *
from (
select region, id, dateadded , description,
row_number() over ( partition by region order by dateadded desc ) rr
from your_table )
where rr = 1;
0
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John ClaesConnect With a Mentor Senior .Net Consultant & Technical AnalistCommented:


This would by my answer


select * from [TBL] where id in (select max(id) from [TBL] group by Region) order by region

What I do is to take the max Id for each Region and then select the records for witch the Id's are returned.
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markejAuthor Commented:
I tried  using the following
select *
from (
select region, id, dateadded , description,
row_number() over ( partition by region order by dateadded desc ) rr
from your_table )
where rr = 1;

BUT I get an error SQL Server doesn't recognise the "Over" command.

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markejAuthor Commented:
I thought I had deselected Oracle, missclick rather than intentional., as for OVER I thought my ISP's SQL Server was running 2005, how do I check?

That works as well thanks.

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markejAuthor Commented:
Partial hicup over the OVER cmd and Selecting ORACLE but apart from that 3 answers that were good and presented quickly
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LowfatspreadCommented:
select @@version

even if they are running sql server 2005 , your database may be ruynning at at lower compatability level

You can check the compability of a database simply by running the below sql command.

sp_dbcmptlevel 'DatabaseName'

60 = SQL Server 6.0
65 = SQL Server 6.5
70 = SQL Server 7.0
80 = SQL Server 2000
90 = SQL Server 2005
100= sql server 2008
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