John Lim - Baking Data with ADOdb and Oracle:

"I suspect that some open source advocates will be puzzled by my praising Oracle. Well my work involves pushing around massive amounts of data around. The cost of using a commercial database is only a fraction of the total software cost. People say that open source software has great technical support - yes it is good, but what our business needs more is marketing help, which Oracle provides. Using Oracle makes our products more attractive, as customers like to feel that they are running large and powerful applications on their systems (and it's true, we aren't kidding them). MySQL and PostgreSQL don't feel sexy to our clients."