I hope someone can help!

I have two excel files with member records. Both files have social security numbers for each member. I need to know which members in file #1 are not in file #2.

I don't simply want to merge everything because i don't want to have to go through one huge file (of 15,000 records) just to sift through duplicates.

Is there a way to just extract the records that don't match?

I'd appreciate a solution! =)

Thanks,
Eric