Chapter 14. Constraints and views: Protecting Data Quality
Your database is reaching new levels, and other people need to use it. The problem is that some of them won’t be as skilled at SQL as you are. If your job site failed its most recent safety inspection, it’s time to plan the work and work the plan. This chapter builds on your experience from previous chapters. First, you need new ways to constrain your data to keep others from entering the wrong values. And second, you also need views to make queries easily repeatable or to allow members of your crew to only see part of the data. In this chapter, we enter the hard hat zone and thus begin protecting our data from the mistakes of others. Welcome to your first line of database defense—heads up!
Help wanted
Luckily, Abby’s hired a few friends to help out. Her cousin, the Chef, is new to SQL. She’ll handle inputting new locations into the database. Abby’s friend Ana is a bit more experienced, so she’s going to match customers up with optimal travel destinations. Abby onboarded both the Chef and Ana by explaining her database and describing what each table contains.
Chef’s first day: Inserting Ingersoll
The Chef is sitting ...
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