HSQLDB is a relational database engine written in Java, with a JDBC
driver, supporting a subset of ANSI-92 SQL. It is a small, fast
database engine supporting both in-memory and disk-based tables. This
product includes Hypersonic SQL.

HSQLDB for Sharp Zaurus SL-5500 contains a Database Manager with the
following functions:

• Inspecting all tables and columns of a database in a tree
  view.
  
• Editing and executing any SQL statement.
  
• Loading and saving of SQL scripts.
  
  
• Using simple forms for each table for searching, editing or
  deleting rows. The forms are automatically generated and respect
  referential integrity.
  

For further information read the online
documentation at http://www.ulrivo.de/zaurus