Throughout the lecture, many tables I designed in the field, as well as those designed by other developers, kept flashing through my mind. Although I don't have much development experience yet, I agree with Young-han's point that database design is the most important aspect. Because of this, I feel a sense of responsibility and pressure in my practical work, which leads me to put a lot of thought into it. When I was contemplating on my own, I felt stuck due to my lack of design experience, but I was able to learn a lot through this lecture. I will review this several times to internalize the concepts and become a developer who strives to create even better designs in the future. Thank you.