DB
Database — any system that stores structured data and supports queries and updates over it.
Definition
DB is the short form for database: any persistent store of structured data that supports queries and mutations. Relational DBs (Postgres, MySQL, SQLite) use SQL and enforce schemas; document DBs (MongoDB) store JSON-ish records; key-value stores (Redis) trade structure for speed. Most automation work touches a database somewhere: source of truth, audit log, or job queue.
When to use
See also
- Postgres — The open-source relational database — the default choice for production SQL workloads.
- SQLite — Embedded, file-based SQL database — the most-deployed database in the world, runs without a server process.
- Redis — In-memory key-value store — the standard pick for caches, queues, rate-limit counters, and pub/sub.