It's been a while since I took the course, but I'm just now coming to write a review~ In fact, there were embarrassing times when I looked at the legacy codes of companies that used old DB access technologies and complained about why Spring Data JPA was simpler than this. Looking back on myself, I think I was only focused on the current trends without understanding each technology. While listening to the teacher's lecture, I felt gratitude for the technology while accessing the DB by directly obtaining and closing connections, and using Jdbc Template. It was fun to learn about the features and pros and cons of each while improving them step by step with MyBatis, JPA, Data JPA, and Query DSL. In particular, Spring transactions are really important in practice, but I felt embarrassed that I developed without knowing that. I'm also really looking forward to the next Spring Boot lecture, so I hope you'll come out with news soon!! Thank you always.