Comparing databases

[coastwalker]

I have one 'master' database, and will be having to match it up with
several other databases that come in once a month for about 6 months.
All the databases will include person's names (as well as other
information), and I want to be able to segregate out everyone on the
additional databases whose name does not appear on the 'master'
database. Is there an easy way to do this?

Thanks!

 

[Dave O]

By any chance is there a unique identifier in each record that would
differentiate between multiple instances of "John Smith"? This would
help immensely.