I just started working with MySQL and PHP, and I convinced a couple of friends to do this too. One of them made this simple question: "Why is MySQL so popular? Why not use some other type of database, like for example one created with FoxPro?"
I know he might have said some stupid things here, but I did not have the arguments to explain to him why.
We both used FoxPro and Delphi to create some applications that were using databases, so maybe this caused some confusions.
Hope this makes sense to you. If someone knows what I'm talking about, please explain this to me, or guide me to some web site.