Beginning-SQL is a project mainly written in ..., it's free.
Course materials for an introductory SQL class
This repository contains the material and notes for a proposed class, organized by Sean Collins, for the PhillyDB meetup group.
This material is written in the hopes of being understood by the layman, which requires some hand-waving and incomplete discussion of topics. As such, I welcome all discussion and fixes that help bring clarity to topics. In most instances, links for further study and more advanced discussion are provided.