I have an Excel file with fields City, State, Zipcode and Consultant which
has a limited number of records and another Excel File that has the fields
City, State, Zipcode and County and includes all zip codes in the US.

How do I go about adding/merging or using the second file to add the County
field in the first file so that I can have the first file with Consultant
show the appropriate County for each Zipcode listed?
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Brian