I've got a job interview set up for Tuesday the 7th, and I'd really, really like to go into this interview fully prepared. I've been told that the work of the team I'm going to interview with "is primarily hard core java code working also with databases. They have been working with Oracle but have moved all but one of their databases to Postgres." I was pleased to hear that, because I started out my SQL experience with PostgreSQL. However, it's been a while since I did anything with it. Is anybody here familiar with websites that could be used for someone to brush up his knowledge of SQL in general, or PostgreSQL in particular?