Deleting duplicate records in SQL


Attached is the documents outlines the sample data and I want to delete the rows that are highlighted in red color. Have been trying with multiple scripts and not successful.

Thanks in advance
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

INSERT INTO tablenew
      SELECT * FROM table tT
                                    WHERE      T.[ItemNumber] = tT.[ItemNumber] AND
                                                T.[ItemCode] = tT.[ItemCode])

tablenew can be a temp table. then truncate table and insert tablenew back into table.
Tpaul_10Author Commented:
Didn't get it quite right with the above code rlarian, how about the following query and gets me what I wanted. Can you please review?

Delete ItemDetails where itemId not in (
select min(itemID) from ItemDetails A
group by ItemNumber,ItemCode) 

Open in new window

just tested. that'll work.
Jim HornMicrosoft SQL Server Developer, Architect, and AuthorCommented:
<air code>  
;with del as (
   SELECT ItemNumber, ItemCode, ItemID
      row_number() OVER (partition by ItemNumber, ItemCode ORDER BY ItemID) as row_number 
   FROM your_table
DELETE FROM del WHERE row_number > 1

Open in new window

Nice timing; I just wrote an article titled SQL Server Delete Duplicate Rows Solutions, so if you have some time to kill give this a read and let me know if you like it.  The above is modeled after the 'Delete #1' section.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft SQL Server 2008

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.