Description:

HSQLDB is the leading SQL relational database engine written in Java.
It has a JDBC driver and supports a rich subset of ANSI-92 SQL (BNF
tree format) plus SQL 99 and 2003 enhancements. It offers a small
(less than 100k in one version for applets), fast database engine
which offers both in-memory and disk-based tables and supports
embedded and server modes.

Additionally, it includes tools such as a minimal web server,
in-memory query and management tools (can be run as applets) and a
number of demonstration examples.