Hacking in WordPress code base is a great way to learn MySQL IMO... it does a very nice job of neatly organizing content using and tags being polymorphic to rep

Hacking in WordPress code base is a great way to learn MySQL IMO... it does a very nice job of neatly organizing content using and tags being polymorphic to represent categories and tags. Really helps to have code samples... otherwise, reference manuals are great for answering questions about how some specific syntax works...