First of all, I listened to it very well. I came in to listen to only the intermediate level, but somehow I ended up listening to the beginner, intermediate, and advanced levels! The explanations are very detailed, and I think it's better because I can repeat the problem-solving many times~! If you make a project (data organization, extraction, etc.) using SQL using actual marketing data so that I can apply what I learned to a project, I think I'll get a better sense of how it's used in practice. Please do it! I'll definitely listen to the next lecture when it's uploaded! And I'm going to take the recommendation system class now ^^ Thank you, teacher! yejil8@uci.edu