1. Go to the database window, go to queries, click New and run the Find
Duplicates Query Wizard. This will give you a list of the zipcodes where you
have more than one in which all five characters match and the number of
duplicates of each of these zipcodes.
2A. Create a query based on the table with the zipcodes. Include the
zipcode field and enter the following in a blank field in the query:
ThreeChars:Left([Zipcode],3)
2B. Again go to the database window, go to queries, click New and run the
Find Unmatched Query Wizard.Follow the directions to find the zipcodes in
the your table that are not in the query in 1.
2C. Go to the database window, go to queries, click New and run the Find
Duplicates Query Wizard on the query in 2B.