Hello- my first post to the Excel group. I'm new on 2003 (SP2).

I have existing records of FirstName, LastName and Company.
I'm planning to upload additional records of FirstName, LastName and Company
and want to make sure that I don't upload any already exisiting records.

How can I compare FirstName, LastName and Company from one file (all 3
together would make the record "unique") against FirstName, LastName and
Company from another file?
Thanks for your help!