Here are a number of links I have found useful when working with databases:
- Experts Exchange - Site for exchanging hints and tips.
- r937 - Excellent source of good quality SQL web links.
- SQLZOO - Andrew Cumming's online SQL
environment. Similar to mine but without the automatic feedback. The
main strength of his site is the ability to choose your database to
run on (e.g Oracle, MySQL, dbase).
- soniq.com - Focused and informative list of moderated site links targetted at web developers. One to watch for the future. If only my links page was as good as this one!
- TechTutorials - A tutorial index site. Plenty of links for a variety of subjects, including database systems.