It's been a while since I recorded this class, so I have to rewatch the video to tell you for sure, but generally, if you can get it to work with a query, then definitely use a query. A "DLOOKUP" or any kind of lookup is much, much slower, so if it works for you, good catch! Did you try it? If it doesn't work, I don't remember my exact reasoning. Like I said, I recorded this several years ago. I don't have time right now to go back and rewatch it, but it could be that I wasn't thinking at the time. Sometimes I fall into the bad habit of relying on a "DLOOKUP" when a more complicated query would definitely be better. Sometimes I like to get it working first, and then I'll go back and optimize it. So, I don't know what I was thinking at the time. Give it a try, and let me know if it works.