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# How to find out about duplicate Id?

Posted on 2013-11-10
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Hi Guys, there is duplication of trade IDs in an Excel spreadsheet I have. If I have a trade Id "567893.28" for example. How can I count how many times this appears in Column "C"? Is it a "Countif" formula? If I have the Value in the Cells ("F1") and I want to find out how many times that appears in Column C, what would be the formula?
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Question by:Justincut
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LVL 43

Expert Comment

ID: 39636752
=countif(datarange,number)
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Expert Comment

ID: 39636753
=countif(C:C,F1)
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LVL 7

Expert Comment

ID: 39636800
If you have multiple IDs duplicated, you could you the contingency table (visual group by SQL equivalent in Excel) to find out which IDs and how many times are duplicated. Then you can use the countif to search for one after another.
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Author Comment

ID: 39636811
What does the Contingency table mean?
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Accepted Solution

celazkon earned 500 total points
ID: 39636845
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