DaveWentzel.com All Things Data
I used to use ERWin quite a bit...now I don't get the chance to as much. It seems as though management wants to "just get by" with tools like Visio.
In any case I have a series of ERWin templates, presentations, and Word docs here , here , and here that I still occassionally find useful.
Data Modeling Overview
Here is a data modeling presentation I did years ago. It's very lengthy but goes over (nicely I think) concepts that occassionally trip people up such as:
- weak entities
- physical vs logical models
- how to express ternary relationships
- Normal Forms
- Lots, lots more
This is a great PDF on every possible issue, for almost every major RDBMS, relating to Developing Temporal Database Designs. I love to reread this every few years.