Chip Pearson has lots of techniques to work with duplicates:
http://www.cpearson.com/excel/duplicat.htm
> Is there any way to compare data in two Excel spreadsheets? Let's say
> I've got 10000 line items in one file and 9000 in another. I'd like to
> find out which 1000 items are missing from the one file. Assuming that
> I have a column with a primary key, is it possible to compare the two
> files? Thank you.

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Dave Peterson
Erskin! - 10 Jul 2007 15:02 GMT
Thanks Dave, I'll give it a look.
>Chip Pearson has lots of techniques to work with duplicates:
>http://www.cpearson.com/excel/duplicat.htm
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>> I have a column with a primary key, is it possible to compare the two
>> files? Thank you.