This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
Paul is correct that it is not specific to hsqldb. It's not general SQL either though as SQL is a language. It would be more accurate to say that it applies to most if not all database implementations.