This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
It looks the same, but it isn't. The big difference is where your database supports on update restrict and on delete cascade (not all do) this will happen all the time, regardless of which application connects to the database to manipulate the date. In the case of an ORM offering this behaviour it will happen only when that specific application manipulates the data.