The database for the most common language is php mysql, you can download it from mysql.com site. However, you can use other databases such as Oracle, Sybase, mSQL, PostgreSQL or anyone with ODBC connection. In this tutorial we use mysql as the default.
For PHP to interact with a SQL database, regardless of the database, there are three basic commands that must be used: one that connects to the server's database, one that selects the database to be used and one that performs a "query" SQL.
