Designing Performance-Optimized JDBC Applications - Presents general guidelines to help solve common JDBC system performance issues - http://www.datadirect.com/developer/jdbc/topics/perfoptjdbc/index.ssp
JavaWorld Topical Index - Databases - A collection of JavaWorld articles on databases. - http://www.javaworld.com/channel_content/jw-jdbc-index.html
The Design of a Robust Persistence Layer for Relational Databases - An AmbySoft Inc. white paper by Scott W. Ambler. This design reflects author's several years of experience building and using persistence layers in several languages. - http://www.ambysoft.com/essays/persistenceLayer.html
Getting Started with JDBC - Learn how to get started with JDBC, a mechanism that allows Java to talk to databases. - http://www.javacoffeebreak.com/articles/jdbc/