Submitted by Jesse on Tue, 01/19/2010 - 14:39
Many people use Drupal to build websites -- and with great success. But deep inside Drupal is an SQL database (MySQL or Postgres, and in Drupal 7, SQLite). In addition to storing content in the database using the Drupal core and contributed modules, you can use CCK and Views to build a collaborative database-driven app on that same database.