Your best starting point would probably be to work out the process you have to follow, and start coding it.

You could start by looking at DBI. Then when you run into problems, read this guide to posting a question.

As per cogs posting, step one is probably to write a simple script that reads data from a database.

Update: I sort of assumed that you already have a database you want to interact with - but cog is quite right, step one is to get your database set up, then try and read from it using perl!