I've tried learning databases and SQL multiple times but always gave up halfway through, but thanks to this course, I was able to complete it. Since the instructor is the book's author who taught directly, it connected well with the book content, and having a separate textbook made it much easier to review and keep up with the progress. It was great that all content from the beginning to the end of the book was covered, allowing me to get an overview of SQL as a whole. In particular, I think it was good that the instructor showed coding in real-time and gave separate practice time in between, making it feel like taking a real-time class even though it was online. For the most important parts in practice like SELECT statements, over 15 hours were allocated for in-depth explanations, and the instructor directly solved the 'review problems' at the end of each chapter, which was fun and helpful. Although it was a long course of over 29 hours and wasn't easy to watch completely, I don't think there's any content to skip. I recommend this to those who find it difficult to study alone and prefer having a book alongside.