Data Integrity — The Non-Negotiable
Referential integrity, constraints, and why 'just fix it in the application layer' is a recipe for disaster.
Imagine a bank that lets you withdraw money from an account that doesn't exist. Or a hospital that lets you prescribe medication to a patient record that was deleted last week. Or an e-commerce system that charges a customer for an order that references a product no one can find in the database.
These aren't hypotheticals. These are the kinds of bugs that happen every day in applications that treat data integrity as optional. And the root cause is almost always the same: someone decided to enforce the rules in application code instead of the database.
Data integrity isn't a nice-to-have. It's the foundation everything else rests on. If you can't trust your data, you can't trust anything your application does with it.
What Data Integrity Actually Means
Data integrity is the guar
This lesson is part of the Guild Member curriculum. Plans start at $29/mo.