In my opinion the notion of implementing business logic outside of the database and acknowledging the longevity of the data are not necessarily in conflict. You

In my opinion the notion of implementing business logic outside of the database and acknowledging the longevity of the data are not necessarily in conflict. You need to have a well defined model and you can choose whether the database is a full implementation of that model or just a representation of the state of that model. I don't find databases well suited for expressing complex behavior - programming languages are far better at that.