Prisma ORM is a highly productive tool, but in practice, you must consider more than just simple CRUD—including schema design, relation structures, state value design, transactions, migration management, and query performance. This course is not an introductory manual that simply lists Prisma syntax; it is a practical guide summarizing how NestJS backend developers should design and operate Prisma in real-world scenarios. It is specifically designed for those who have learned the basics by reading the official documentation but feel uncertain about the criteria for dividing models, when to use transactions, or how to apply migrations safely in actual projects. Through this course, students will go beyond using Prisma as just a "convenient ORM" and learn how to design schemas optimized for maintenance, while establishing standards to avoid common real-world issues in advance.