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Editorial Team
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Asked: 2026-05-30T22:03:26+00:00

I’ve got duplicate dates in my first column. I have corresponding ratings in the

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I’ve got duplicate dates in my first column. I have corresponding ratings in the next columns. My goal is to combine the ratings into all one date only if they are duplicate dates. I have many duplicate dates and for each duplicate I simply want to combine the numbers:

DATE      5STAR   4STAR   3STAR   2STAR   1STAR
12/2/2009   0      1       0       0       0
12/2/2009   1      0       0       0       0
4/6/2011    1      0       0       0       0
4/6/2011    1      0       0       0       0

So in the example above I would want to be left with:

DATE       5STAR   4STAR   3STAR   2STAR   1STAR
12/2/2009    1      1        0       0       0
4/6/2011     2      0        0       0       0
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1 Answer

  1. Editorial Team

    Assuming that your original sheet is called “duplicate data” and that you have created a second sheet called “combined data” and which has exactly the same format but with only one row per date, but this formula in B2 of combined data and drag down and over as far as necessary:

    =SUMPRODUCT(('duplicate data'!$A$2:$A$5='combined data'!$A2)*'duplicate data'!B$2:B$5)

    In Excel 2007 and 2010 you can easily remove duplicate dates using Remove Duplicates in the Data tab. In XL 2003 I believe you’d use the Advanced Filter in the Filter item of the Data menu.

    If you’re going to be doing this more than once, I’d look at normalizing your data a bit so that you could do this with a pivot table. If I’m guessing correctly that only one column per row ever gets a one, i.e., there’s only one rating per row, and your data looked like this…

    DATE        Rating
12/2/2009   4STAR
12/2/2009   5STAR
4/6/2011    5STAR
4/6/2011    5STAR

    … you could easily create a pivot table from it.

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