Just to take a different perspective for anyone reading this, your database is more than _just_ your persistence layer. It can be where rules about the business live. Rather than rely on 12 different applications or code in 27 different files to maintain the proper rules, you can enforce those rules right where the data lives, guaranteeing that no matter what moron is writing code, the data will be pristine because the database has checked it before putting it in.

Edit: Just to be clear, I'm not saying it's the right thing to do, at least not in every case. But it's an option; one that's different from the parent's perspective anyhow.