There are a whole lot of Database platform in the IT world. For instance , Oracle, Firebird, Sybase etc. I only choose
two of them in this tutorial, they are mysql and postgresql. Mysql is a open source project. It is a most popular database component in the personal hosting service. It can work very well with PHP together. And, postgresql is also a open source project base on the BSD license. It’s an object-relational database system. compare with mysql. postgresql is more powerful feature like Views, Triggers, and Unions. on the other hand, the speed of mysql is faster than postgresql.
The ports system also will be used in building database. make sure your ports system has been update. and versions of mysql and postgresql need be latest.