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    dannac's Avatar
    dannac Posts: 267, Reputation: 9
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    #1

    Feb 21, 2014, 08:55 AM
    Count unique dates on different sheets
    My workbook has 26 sheets as pictured below.


    On sheet 27 I would like to set up some type of formula that will count the unique dates from all 26 sheets. Dates will always be from A15:A30.


    Below example would give a count of 6.


    dannac's Avatar
    dannac Posts: 267, Reputation: 9
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    #2

    Feb 21, 2014, 09:01 AM
    Forgot to mention, sheets are as 01, 02, 03,. 10, 11, 12, etc .
    ScottGem's Avatar
    ScottGem Posts: 64,970, Reputation: 6056
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    #3

    Feb 21, 2014, 09:14 AM
    This article should help.Excel Count Unique Values

    You can add a cell in each sheet that counts the unique dates, then have a summary cell to add them from all the sheets.
    talaniman's Avatar
    talaniman Posts: 54,122, Reputation: 10852
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    #4

    Feb 21, 2014, 09:22 AM
    I point out that B-E inclusively counts as one cell.
    dannac's Avatar
    dannac Posts: 267, Reputation: 9
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    #5

    Feb 21, 2014, 12:27 PM
    Thanks for the reply.

    This formula works as long as its on the same sheet.

    =SUMPRODUCT(--(FREQUENCY($A$15:$A$30,$A$15:$A$30)>0))

    I tried having it look at a different sheet but cannot figure the correct syntax.
    dannac's Avatar
    dannac Posts: 267, Reputation: 9
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    #6

    Feb 25, 2014, 05:07 AM
    With my sheets as 01, 02, 03, etc... I would like the formula below on different sheet.


    I get the error message when I try to reference a different sheet.


    Anyone see something wrong with the syntax ?




    =sumproduct('01'!--(Frequency(a15:a30,a15:a30)>0))
    JBeaucaire's Avatar
    JBeaucaire Posts: 5,426, Reputation: 997
    Software Expert
     
    #7

    Mar 8, 2014, 11:03 AM
    Sheet references must be attached to each range of cell references:


    =SUMPRODUCT(--(Frequency('01'!a15:a30,'01'!a15:a30)>0))
    dannac's Avatar
    dannac Posts: 267, Reputation: 9
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    #8

    Mar 10, 2014, 04:05 AM
    Thanks JB

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