H2 Database
H2 Database is an open-source, embedded, in-memory relational database management system written in Java. It supports standard SQL and JDBC APIs, making it lightweight and easy to integrate into Java applications for development, testing, and small-scale production use. It can run in embedded, server, or mixed modes, offering flexibility for various deployment scenarios.
Developers should learn H2 Database for rapid prototyping, unit testing, and development environments where a lightweight, fast, and self-contained database is needed, such as in Spring Boot applications or microservices. It's ideal for scenarios requiring quick setup without external database dependencies, like automated testing or demo applications, due to its in-memory capabilities and minimal configuration.