Databases

This layer provides persistent storage, relation management, and state integrity for application data. The first decision is between a structured relational database and a document store, and between an unbundled serverless database and a full backend platform. Managed relational platforms like Supabase give you a full Postgres database with realtime subscriptions, backup automation, and row-level security enforced in the database engine. A common mistake is choosing an unconstrained document store for deeply connected business records, or skipping database migrations during development. That eventually leads to corrupted records, inconsistent relational integrity, and painful schema repairs once you scale in production.