FreeSQL
Provides novice users free MySQL and PostgreSQL databases with which they can learn SQL.
HTMLDB.com
Oracle HTMLDB web application hosting with additional services based upon the fast and easy to use web-based development environment.
MySQL Hosting Plans
Directory of links to companies offering MySQL hosting.
MySQL Database Hosting by BizHostNet
Offers free accounts for developers for online database programming with connection exmples.
MySQL Hosting by Rackspace
Mysql hosting service by Rackpace and certified by MySQL AB.
Revion Solutions
Reliable, comprehensive Oracle database hosting solutions backed by unrivaled technical and customer support.