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.
We cannot help unless you tell us what application server you are using. For example if you use JBoss the attribute-field mapping data can be found inside jbosscmp-jdbc.xml. Tell us the app server you are using.