XLGibbs, thank you. I know this is kindergarden material to you however it really means a lot to me. I compared both queries that you sent. The results don't make any sense. My plan was to run a query that brought up any Customers that had their "Return Date" feild blank - a blank feild would mean an outstanding rental. We can make up whatever we want in this project. Instead I'm getting the only customers ID that isn't in the rentals table (Hopper). I'm going to play with it for a bit and see what happens.

Your posts have been encouraging.