Looking for a incremental SQL course that would likely be similar to the this Ruby Koan course; which is in fact inspired by the book, "The Little Lisper", which uses a short questions/simple answers style of learning.
Basically the format is short questions are within a well defined context, with a simple answer, that incrementally building and leveraging the student's knowledge within the subject matter, while keeping the to the short questions/simple answers style of learning.
Also, I just wanted to note that I know there are a number of ways to learn SQL, but I'm looking for an existing implementation of this way. This style provides a fixed-path with stepping stones, and if you do not finish a set of questions, you're not allowed to go on, and even if you were able to find a way to cheat this, it would just make things harder, not easier; meaning it's not just free-form learning with information present small packets.
Best Answer
Have a look at:
http://sqlzoo.net/
This seems to be what you are looking for.