Zip Code to City/State and vice-versa in a database?

Question

I\'m new to SQL and relational databases and I have what I would imagine is a common problem.

I\'m making a website and when each user submits a post they have to pr

Answer 1

Not sure I understand the question. Do you need to allow either and, later, return both?

You'll have to be careful, even with a zip/city database that can be purchased, since some cities span multiple zips, so you can't always "calculate" in that direction. Similar issue in the opposite direction.