Code for post code search from database

Hi
Does anyone can help me to write a code to add a search option to my website page. Requirements are below:

  1. If customer add post code into input field, it says only two results either we don’t deliver to this post code or we deliver to this post code Monday or whichever day we add into database.

  2. My dataset contains delivery zones and post code data which has only two fields such as delivery day and post code.

Maybe you want to provide an example of your DATABSE ?
Show all related and important DB-Fields.