Relational Database info
Wil, I understand that it can be extremely frustrating when trying to get your head around relational database and their design. And how it relates to WA plugins.
Don't underestimate the power that WA plugins delivers to the web developer. The power and usability limits are only limited by ones understanding of the subject including your creative flair.
I have been at the point of not having a bloody clue what I was doing.
My successful action to understanding the whole subject of relational database was to study this book.
it is a VERY VERY good book and worth every penny.
Making sure I had a dictionary handy so any word or concept I didn't understand I could discover its meaning.
Then with a piece of paper and a pencil do lots of practical exercises that are included in the book until you feel happy.
Download a copy of workbench and do some more tutorials with that.
If you follow this path you will be at a level you may not have believed possible and new door will open.
Once there you will have a whole new appreciation of what tools WA have created for us.