- Create a separate table with the Postal Zone and Rate Fields.
- Create all 8 records with the Postal Zone Code and Rate values.
- Create an Update Query with main Table along with the newly created Rate Table and link both tables on Postal Zone Code.
Sample SQL is given below:
Code:
UPDATE Table1 INNER JOIN Table2 ON Table1.PostalCod = Table2.PostalCod SET Table1.Rate = [NewRate];
You may have several records of the same Postal Zone Code in the Main Table. All of them will be updated with the same Rate.