Assuming these are some type of identifiers you can go to an adjacent column
and do in B1
=countif([Book2.xls]Sheet1!A:A,A1)
then drag fill down the column
in book2 in B1 you could do
=countif([Book1.xls]Sheet1!A:A,A1)
and drag fill down the column.
zeros would indicate the item is unique to that workbook.
--
Regards,
Tom Ogilvy
"Jay Jones" wrote:
> I have to compare 2 lists of numbers every month and find the difference
> between them
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