Welcome to H2, the Java SQL database.

The main features of H2 are:

1. Very fast, open source, JDBC API
2. Embedded and server modes; in-memory databases
3. Browser based Console application
4. Small footprint: around 2 MB jar file size

More information: https://h2database.com

Features

	H2	Derby	HSQLDB	MySQL	PostgreSQL
Pure Java	Yes	Yes	Yes	No	No
Memory Mode	Yes	Yes	Yes	No	No
Encrypted Database	Yes	Yes	Yes	No	No
ODBC Driver	Yes	No	No	Yes	Yes
Fulltext Search	Yes	No	No	Yes	Yes
Multi Version Concurrency	Yes	No	Yes	Yes	Yes
Footprint (embedded database)	~2 MB	~3 MB	~1.5 MB	—	—
Footprint (JDBC client driver)	~500 KB	~600 KB	~1.5 MB	~1 MB	~700 KB