It was beyond my expectations. As mentioned in other reviews, I could hear some background noise during the lecture (at the beginning), but it became less audible as it went on. This is a lecture that can help you build confidence in SQL, and I recommend it to beginners. Thanks to Joe's lecture, I was able to build trust in Infraon, which I first encountered. Please continue to provide great lectures in the future! (I would be even more grateful if you could give me a discount)