While it's been a good 10 years, since I did any SQL, I'm pretty sure the interpreter is not working properly. In the first exercise, when you put in the query for Name and Age, all you get is data in the Age column and blanks in the Name. That's from doing a copy / paste from the answer. I tried other commands and got what I thought were odd results as well.

I've tried using Firefox 3.5.12 and Explorer 7.