[Lv2] A Complete Guide to JPA for Professional Developers — From the Persistence Context to Practical Patterns
You’ve written SQL with JdbcTemplate before, right? I’m sure everyone has experienced the frustration of having to modify both the SQL and the RowMapper every time a single column changes. This course begins with that pain. A single SELECT using plain JDBC takes 35 lines. You open a Connection, create a PreparedStatement, iterate through the ResultSet, and if you forget even one close(), the server goes down. After typing through this hell yourself, encountering JPA’s one-line save() makes you feel, not just understand, “This is why people use JPA.”
134 learners
Level Basic
Course period Unlimited
[Dingco Dingco] Releasing 11 types of free materials, including 4 types of textbooks 🎁
Hello, this is Dingco Dingco!!! 👋👋
To express my gratitude to those who have taken Dingco Dingco courses and supported me, I am releasing 11 types of free materials.
At DingcoDingco, we place great importance on fundamental skills that last a long time.
That's why I've made these materials available, hoping that more people can first experience the fundamental resources that last a long time once established, such as Web Security, TDD, Clean Code, and Basic Web Development.
The materials released this time include not only simple summaries but also textbook-style materials used in actual classes.
Public Materials
- Basic Web Development Concepts Textbook: Internet/Web, Client/Server, HTTP, JSON 🌐
- Web Security Textbook: Encryption, HTTPS/SSL, Cookies/Sessions, JWT, OAuth 🔐
- TDD Textbook: JUnit5, Mockito, Spring Testing, Functional Testing, Refactoring
- Clean Code Textbook: Naming, Function Separation, Exception Handling, Refactoring, Practice Assignments
- JPA Interview 20 Questions
- Spring Boot Interview 18 Questions
- 23 Selected Technical Interview Questions for Entry-level Backend Developers
- Backend Interview Notion Workbook
- Latest Algorithm Exam Questions Notes
- DB Worksheet
- Git Cheat Sheet
I have organized both free material coupons and lecture discount coupons in the KakaoTalk channel coupon box.
Please feel free to take any materials you need!!! ❤️
I hope these serve as a guide for those just starting their studies and as a checkpoint for those already studying to identify any missing areas.
For those who wish to continue their studies more systematically, I also recommend checking out each lecture along with the roadmap!
- KakaoTalk Coupon Box: https://pf.kakao.com/_xhwxfPX/coupons?filter=usable
- List of free materials: https://dingco.net/free-guides





