The concepts are explained concisely with pictures, so it's easy to understand, and since it's a lecture focused on practice, it's a good lecture to learn the concepts on your own. It's very informative because it only covers the necessary content in a practical way, and even though I'm the type who doesn't listen to online lectures well, I enjoyed it ㅎㅎ ++ While creating a project with Spring Boot, I felt the importance of DB design, so I'm listening to it over and over again. This lecture is really a must-take lecture before studying Spring or Spring Boot.....