Simple Merge / Purge with Excel

Posted by Patrick McElhaney on Super User See other posts from Super User or by Patrick McElhaney
Published on 2009-07-16T20:02:27Z Indexed on 2010/04/12 2:23 UTC
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excel

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merge

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purge

I have four Excel files that contain email addresses. I need to find out how many unique addresses are in the first three, but not in the fourth.

What's the easiest way to do that?

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