Rebuild index results in duplicate key violation

Posted on 2016-08-29
Last Modified: 2016-09-01
This is SQL 2005. I ran the Rebuild Index routine and it errors on one of the databases. The error is a violation of the primary key on a table. Somehow there is a duplicate record in the table. How do I find which records are duplicates and rebuild the index?
Question by:rwheeler23
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LVL 28

Assisted Solution

by:Pawan Kumar
Pawan Kumar earned 250 total points
ID: 41775808
You can use below example to find out duplicate values..

    id, orgName
         orgName, id,
         ROW_NUMBER() OVER (PARTITION BY orgName ORDER BY id) rnk
     FROM organizations
) AS d
WHERE rnk> 1

Let me know if you need more info here !
LVL 41

Accepted Solution

Sharath earned 250 total points
ID: 41776916
You can simply group on key columns and check if there are any duplicates.
SELECT pk_col1, pk_col2 -- list all your pk_columns
       ,COUNT(*) cnt
  FROM your_table
 GROUP  BY pk_col1, pk_col2 -- list all your pk_columns

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Author Comment

ID: 41779040
There are twelve databases with this table. I have run both of these on all databases and no results are returned. I am going to run rebuild index on each database individually.
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LVL 28

Expert Comment

by:Pawan Kumar
ID: 41779277
Great ! let us know in case of any issue.

Author Comment

ID: 41779516
Fortunately the rebuild index task tells you then record causing the issue. It happened in only one database and there were actually 6 duplicate records. Once I removed the duplicates the rebuild task finished without error. Very odd that duplicate records were allowed in the first place since they violated the primary key.
LVL 28

Expert Comment

by:Pawan Kumar
ID: 41779524
Great ! Please go ahead and close the question and mark one or more comments as accepted solution. !!

Keep Learning.

Author Comment

ID: 41779759
Thanks for your help.

Author Comment

ID: 41779762
Both solutions were equally helpful.

Author Closing Comment

ID: 41779763
Thanks for your help.

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