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September 7, 2008 04:42am pdt
 
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How to backout records from insert with delete

Tags: T-Sql
I ran the following insert query:
Insert into FileOne
   (CNumber,
     ID,
    DCode)
Select
    a.Cnumber
   a.ID
   a.DCode
FROM PFILE a
    INNER JOIN TFile b
   on a.ID = b.ID

The problem is that the field DCode in PFILE a contained nulls which violated the constraint in FileOne that says nulls are not allowed on DCode.  The query ran until it hit the nulls, then errored out.  I've changed the query to add "WHERE DCode is not Null"  but now there are records in FileOne that have been inserted and I can't rerun the query because there are duplicates in FileOne.  I think I can safely back out the records I added with the following:

DELETE * From FileOne a
     INNER JOIN Pfile b
    ON a.ID = b.ID

Does this sound right?  Will this delete work to remove only the records inserted in the first query?


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Question Stats
Zone: Programming
Question Asked By: dkcoop03
Solution Provided By: sqlconsumer
Participating Experts: 2
Solution Grade: A
Views: 0
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