Indexing
Most of the courses available teaching a flavor of SQL is using some kind of a demo or sample database. Most likely none of the students will know anything about the data model they are using, and they will use quite a bit of time to learn a bit about the data model, a knowledge whis is more or less waste when the coruse is over. So, what about a SQL course that simultaneously teach you a data model that will be useful even after the course. Welcome to a SQL school using the system tables and views.
