Database Infrastructure
Every real app eventually needs to remember things — users, orders, messages, settings. That memory lives in a . For a beginner, "database" can feel like a black box guarded by experts. It isn't. This chapter demystifies the data layer so you can make good choices and direct AI to do the heavy lifting safely.
The thing to internalize early: code is replaceable, data usually isn't. You can rewrite a buggy function in an afternoon, but a column you corrupted last Tuesday — or a backup you never took — may be gone for good. That asymmetry is why the data layer rewards a little upfront understanding more than almost any other part of your stack.