7. Expanding Data Protection with Check Constraints and Triggers

One of the weirdest things I see in database implementations is that people spend tremendous amounts of time designing the correct database storage (or, at least, what seems like tremendous amounts of time to them) and then just leave the data unprotected with tables being more or less treated like buckets that will accept anything, opting to let code outside of the database layer to do all of the data protection. Honestly, I do understand the allure, in that the more constraints you apply, the harder development is in the early stages of the project, and the programmers honestly do believe that they will catch everything. The problem is, there is rarely a way to be 100% sure that code written will always enforce every rule.