Originally posted by steeve123

I want to make them use constraints, but they told me they did not have any data lost because of not having constarints. But still why use a expensive database and not using basic security?
From the 20,000 foot view, he's correct. Constraints had nothing to do with losing data. I would educate the client on the benefits of constraints and data integrity. If they're not worried about it, I wouldn't lose sleep over it.