This is a really good lecture. I only encountered JPA through books, and it was so difficult that I couldn't even properly understand the basic principles. After listening to the lecture, I was able to understand why it was used and how the mechanism works. It was a lecture that made me want to quickly learn Spring JPA and Query DSL. Thank you. However, since IntelliJ is a little unfamiliar, it would be more helpful if the instructor told me the shortcut keys he uses one by one.