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Excel 2007 : How to avoid duplicate entry

  1. #1
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    How to avoid duplicate entry

    i want to create a excel sheet with following columns

    Item code Desp. Quantity


    is there any formula which can check that item code being entered is not repeated.
    Last edited by suhail; 10-24-2010 at 10:16 PM.

  2. #2
    Forum Moderator - RIP Richard Buttrey's Avatar
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    Re: How to avoid duplicate entry

    Hi,

    Assuming the item code is in column A, in a helper column, say column D add the formula

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    and copy down as many roes as necessary.

    Rgds
    Richard Buttrey

    RIP - d. 06/10/2022

    If any of the responses have helped then please consider rating them by clicking the small star icon below the post.

  3. #3
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    Re: How to avoid duplicate entry

    thanx
    one more is there any that when u enter the same number the cell does not move forward and ask to correct the entry

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    Forum Expert teylyn's Avatar
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    Re: How to avoid duplicate entry

    You can use a custom formula in Data Validation

    =COUNTIF(A:A,A1)=0

    and then set the error message to "Already entered"

    cheers

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    Re: How to avoid duplicate entry

    Thanx Richard Buttrey & teylyn

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