Thank you for the amazingly detailed post, @simonk! I have to admit that SQL is a complete mystery to me, and your explanation was really helpful in starting to understand it. I really appreciate you taking the time to help me out! 
Thank you for the amazingly detailed post, @simonk! I have to admit that SQL is a complete mystery to me, and your explanation was really helpful in starting to understand it. I really appreciate you taking the time to help me out!