H2 is an SQL database engine written in Java (but also available as a native binary). JDBC and ODBC APIs are supported. Embedded and server modes are available. A Web console application is included. Clustering is supported.

Changes

The H2 Console can run as a standard Web application or servlet. PreparedStatement.getMetaData is now implemented. The catalog name can be used in queries. The new, faster view implementation is now enabled by default. The compatibility with PostgreSQL has been improved. A Polish translation is available. Bugs with views, LIKE, large objects, and SELECT UNION have been fixed.

URL: H2 Database Engine