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Finding duplicates and assign the corresponding concatenated values

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    Question Finding duplicates and assign the corresponding concatenated values

    Problem: to remove the duplicate values and to assign the corresponding values. Some of the files have more than a 10,000 rows (some of which are duplicates), so not appropriate, rather impossible to do it manually. Is there any formula to use to remove duplicates, combine the corresponding values using separator and compile a table with no duplicates (file attached)?

    For example, for the number 273.185 (in column A) I have 5 corresponding numbers in each of the columns B, C and D. I would like to delete the duplicates in the Column A but to add the corresponding numbers in Columns B, C and D.


    It should look something like:

    Column A | Column B | Column C | Column D
    273.185 | 722286, 699119, 148561, 518520, 289730 | 1344, 4592, 6342, 6702, 9321 | 89, 71, 36, 54, 97

    Any suggestions?

  2. #2
    Forum Moderator Glenn Kennedy's Avatar
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    Re: Finding duplicates and assign the corresponding concatenated values

    One Way... in F2 copied down:
    =IFERROR(INDEX($A$2:$A$41,MATCH(0,INDEX(COUNTIF($F$1:$F1,$A$2:$A$41),0),0)),"")

    The a bit of code...
    Please Login or Register  to view this content.
    How to install your new code
    Copy the Excel VBA code
    Select the workbook in which you want to store the Excel VBA code
    Press Alt+F11 to open the Visual Basic Editor
    Choose Insert > Module
    Edit > Paste the macro into the module that appeared
    Close the VBEditor
    Save your workbook (Excel 2007+ select a macro-enabled file format, like *.xlsm)

    Then use this array formula in G2, copied across and down:
    =ConcatAll(IF($A$2:$A$41=$F2,B$2:B$41,""),", ")

    Array Formulae are a little different from ordinary formulae in that they MUST be confirmed in the FIRST CELL ONLY by pressing CTRL+SHIFT+ENTER to activate the array, not just ENTER. After that, the array can be dragged down as normal, to cover the desired range.

    You will know the array is active when you see curly brackets { } - or "curly braces" for those of you in the USA, or "flower brackets" for those of you in India - appear around the outside of your formula. If you do not use CTRL+SHIFT+ENTER you will (almost always) get an error message or an incorrect answer. Press F2 on that cell and try again.

    Don't type the curly brackets yourself - it won't work...
    Glenn



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    Re: Finding duplicates and assign the corresponding concatenated values

    Glenn Kennedy,

    SUPERB!

    Your solution is perfect, for which I am very, very grateful.

    Thank you so much. I learned something new today!

  4. #4
    Forum Moderator Glenn Kennedy's Avatar
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    Re: Finding duplicates and assign the corresponding concatenated values

    You're welcome.

    If it's too slow getting the uniwue values, let me know ....


    If that takes care of your original question, please select "Thread Tools" from the menu link above and mark this thread as SOLVED.

    It'd also be appreciated if you were to click the Add Reputation button at the foot of any of the posts of all members who helped you reach a solution.

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