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For example what I'm doing is seeing if there are duplicate WORKORDER NUMBERS in two different spreadsheets.

What I'm doing now is copying a WO # from one worksheet and selecting FIND on the other to see if it's present, but there are thousands to search through:(

I need to create a third spreadsheet with the Employee #'s that aren't duplicates.

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Please edit you post to include clarification and some idea how the data is laid out. The title is a little confusing. Also, only ask one question at a time. Here you are discussing SS, work order numbers and employee number duplicates. Which do you need help with? – CharlieRB Apr 19 '13 at 19:11
Is this static data, or will it change/update over time requiring you to redo this process? Where does the data come from, a database, manually input, exported from program? Also, which version of Excel are you using? – dav Apr 19 '13 at 19:46

Assume your work order numbers are in column A and B of the same work sheet , from cell 1 down to cell 100.

Use VLOOKUP like this:

In C1 type this formula =VLOOKUP(A1,B$1:B$8,1,FALSE) and then copy it down to C100. You can then filter column C to NOT contain #N/A.

This will quickly show you which are duplicates. The formula can easily be adapted to work over different sheets.

There is probably a better way to do so using VBA, but this solution will work fine.

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