verifying records in two different tables/two different databases

i have table 1 in database 1 that
holds customers...

i have ALL my customers in table 2 in
database 2..

how can i check each record in table 1,
one by one, against the "Master" (table2)
to make sure they match.
i need one by one so if there is not a
match i can deal with that on an individual
basis with an if..else..

thanks in advance for all help.

never mind, i figured it out
with SQL...