Okay, I have found a site which has some information on SQL and implementation - it is a bit hard to link to the page which lists all the tutorials, so I will link them one by one:
- http://c2.com/cgi/wiki?CategoryPattern
- http://c2.com/cgi/wiki?SliceResultVertically
- http://c2.com/cgi/wiki?SqlMyopia
- http://c2.com/cgi/wiki?SqlPattern
- http://c2.com/cgi/wiki?StructuredQueryLanguage
- http://c2.com/cgi/wiki?TemplateTables
- http://c2.com/cgi/wiki?ThinkSqlAsConstraintSatisfaction
