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How to delete duplicate records within a SQL Server 2008 table using a SQL statement?

Posted on 2016-11-28
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Last Modified: 2016-11-29
I am working with a SQLServer 2008 database.

I have a table named "tblBank" with the following 5 fields:

bankID (varchar(50),null)
bankDescr(varchar(50),null)
status(varchar(50),null)
entity(varchar(50),null)
bankAcctNum(varchar(50),null)

Is there a SQL statement to delete any duplicate records within this table?
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Question by:zimmer9
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5 Comments
 
LVL 34

Accepted Solution

by:
Brian Crowe earned 500 total points
ID: 41904624
WITH cteDuplicate AS
(
	SELECT bankID, bankDescr, status, entity, bankAcctNum,
		ROW_NUMBER() OVER(PARTITION BY bankID, bankDescr, status, entity, bankAcctNum) AS RowNumber
	FROM tblBank
)
DELETE cteDuplicate
WHERE RowNumber > 1

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Author Comment

by:zimmer9
ID: 41904637
Msg 4112, Level 15, State 1, Line 4
The ranking function "ROW_NUMBER" must have an ORDER BY clause.
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LVL 34

Expert Comment

by:Brian Crowe
ID: 41904678
There was nothing obvious to ORDER BY but you can just throw any column in there if it doesn't matter which record you keep.
1
 
LVL 66

Expert Comment

by:Jim Horn
ID: 41905810
In addition to Brian's correct answer check out the code and image-heavy tutorial SQL Server Delete Duplicate Rows.  Also if you have any feedback please add it to the bottom of the article.  Thanks in advance.
1
 

Author Comment

by:zimmer9
ID: 41905820
Thanks gentlemen for your outstanding answer and suggestion.  :)
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