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Import from CSV append to table but ignore duplicates

  • August 29, 2006 at 5:45 am

    #67785

    How can I import data from a CSV into an existing table but ignore duplicate records?

  • August 29, 2006 at 6:56 am

    #657258

    You usually create a staging table where you import the data.  Then you insert the "valid" records with something like this :

     

    Insert into dbo.RealTable (Key, Col1, Col2) Select Key, Col1, Col2 from dbo.Staging S where not exists (Select Key from dbo.RealTable RT where S.Key = RT.Key)

     

     

    That will only insert data that is not already in the table based on a single column primary key.

  • August 29, 2006 at 9:43 am

    #657295

    Works like a charm. Thank you. Thank you. Wow there is so much to learn about SQL.

  • August 29, 2006 at 9:46 am

    #657297

    6000 + posts and now I have to start all over again with sql 2005 .  Hopefully I have a headstart this time .

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