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  1. #1
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    delete duplicates in column1 and column2

    hi,
    this is what the table looks like table Product
    I need to delete the duplicate in 'Power Supply' and 'Motherboards' fields
    I've tryed
    Code:
    Delete from Product where `Power Supply`=`Motherboards`
    but it is not working .
    Any idea how to delete them ?

  2. #2
    SQL Consultant gold trophysilver trophybronze trophy
    r937's Avatar
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    delete both duplicates, or only one of them?
    rudy.ca | @rudydotca
    Buy my SitePoint book: Simply SQL
    "giving out my real stuffs"

  3. #3
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    the 1 located in the `Motherboards` column based on the result from `Power Supplies` column.

  4. #4
    SQL Consultant gold trophysilver trophybronze trophy
    r937's Avatar
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    Code:
    DELETE t2 
      FROM Product AS t1 
    INNER 
      JOIN Product AS t2 
        ON t2.Motherboards = t1.`Power Supply`
    as always, back up your data before running any SQL that you got off teh interwebs
    rudy.ca | @rudydotca
    Buy my SitePoint book: Simply SQL
    "giving out my real stuffs"

  5. #5
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    Tnx for your answer.
    I've inserting the values without the duplicates.


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