Honestly, you picked the right one. It's restricted, so what you learn will be widely applicable. Do yourself a favor and pick up some books about SQL by Joe

Honestly, you picked the right one. It's restricted, so what you learn will be widely applicable. Do yourself a favor and pick up some books about SQL by Joe Celko's SQL Puzzles and Answers. If you follow it, you will learn how to accomplish various queries while having restrictions on dialects or whatever. It's a real mind-expander. I found myself doing in SQLite things I hadn't thought possible for that set of keywords.