SQLite
SQLite is a lightweight, serverless, self-contained, and zero-configuration relational database management system (RDBMS) that stores data in a single file on disk. It is embedded directly into applications, requiring no separate server process, making it ideal for local data storage in mobile apps, desktop software, and embedded systems. It supports most standard SQL features, including transactions, triggers, and views, while being highly portable across platforms.
Developers should learn and use SQLite when building applications that need a simple, reliable, and efficient local database without the overhead of a client-server architecture, such as mobile apps (e.g., Android/iOS), desktop applications, or IoT devices. It is particularly useful for prototyping, testing, or scenarios where data is accessed by a single process, as it offers ACID compliance and minimal setup requirements.