Reading these answers, I'm quite confused by the lack of understanding of database programming. I am an Oracle Pl/sql developer, we source control for every bit of code that goes into the database. Many of the IDEs provide addins for most of the major source control products. From ClearCase to SourceSafe. The Oracle tools we use allow us to debug the code, so debugging isn't an issue. The issue is more of logic and accessibility.
As a manager of support for about 5000 users, the less places i have to look for the logic, the better. If I want to make sure the logic is applied for ALL applications that use the data , even business logic, i put it in the DB. If the logic is different depending on the application, they can be responsible for it.