I need some help figuring out how to drop the last four digits of a 9 digit zip code. If I have a list of subscribers with a couple hundred thousand that have zip codes withe the following format...."27751-9099". Is there anyway that I can remove the last four digits so that we can compare zip codes based on a 5 digit basis?
It's not dropping the last four digits, it's extracting the first five?
Good old "substring(zip_code from 1 for 5)"?