Lukas Smith has posted this new item on his blog with details about his 5 hour workshop on relational databases.

I have already added a link to the slides section but for convinience here is a direct link. I think I need to add some slides on character sets and tweak some bits in the coming days when I find some time, but overall the talk went fairly well.

The presentation includes the various sections like "retrieving data" and "talking SQL to PHP" and givs you just about anything you ever wanted to know about relational databases...