This lecture really helped me prepare for SQLD. The instructor explained key parts that are not covered well in other places in detail, so it was easy to understand and it was also very helpful in solving actual problems. In particular, the problem-solving process was very helpful, and while listening to the lecture, I was able to naturally get a feel for how to approach the exam. The instructor's explanation style was also really good. He explained difficult content in an easy-to-understand way and organized it in a way that was easy to remember, which made studying much easier. He occasionally threw in some humor, which brightened the mood and helped me concentrate while listening to the lecture. Whenever he said, "Are you embarrassed by this?" and lightened the mood, I laughed and relieved my stress. I would highly recommend this lecture to those preparing for SQLD. Through this lecture, I was able to solidify the knowledge necessary for SQLD, and thanks to it, I was able to prepare for the exam with more confidence. Thank you so much!