match multiple fields in records

Hi All,

I know how to see if one value exists in an arrray, but is there a way to see if a combination of fields in one array exist in the same combination in another array?

In other words, if I have table A:

Name City
Alyssa Cleveland, OH
Derek Pittsburgh, PA
Larry San Francisco, CA
Merl Provo, UT

and table B:

Name City
Alyssa Pittsburgh, Pa
Derek Cleveland, OH
Larry San Francisco, CA
Merl Philadelphia, Pa

I would like to add a column to table B containing a function that would indicate, in this instance, that only Larry-San Francisco, CA is a record shared by both tables.

Can anyone help me with what that function would like?