This website helped me find out what a primary key is. Apparently it's the column that cant contain any duplicates eg. id.
I also found this site useful since it gave me a list of ways to make a search engine.
However, I realized after some time that perhaps, PHP and MySQL wasnt the way to make a search engine. What if it was actually Javascript? So I did some research

This somehow failed since the browser would not allow searching. I would search and nothing about the page would change. Javascript has always seemed unstable. I guessed that my best bet was PHP and MySQL.
http://www.devarticles.com/c/a/MySQL/Developing-A-Site-Search-Engine-With-PHP-And-MySQL/2/
I was using it, but i havent finished it yet
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