We published Part 9: Understanding the database layer in our on going series about Drupal on developerWorks several weeks ago. The article describes how the Drupal database abstraction layer works using the pager system and our announcement module as discussion points.
We conclude the article with a "gift" to the Drupal community: support for IBM DB2 Express-C. Hopefully someone will take our work and finish it for later versions of Drupal .
