So I want to learn SQL. Now what?
If you don't know anything about SQL or relational databases or if you know some things but you are not sure where to start, I recommend SQL Zoo. SQL Zoo describes itself as a gentle introduction to SQL. Take the time to type down the syntax yourself and if you are not sure if you know what's going on, feel free to stick around and experiment a little with the syntax.
Lesson 0 is about select statement.