Database Scheme Design (9.4 summary)

Through the content of this chapter, I hope to let everyone understand a truth, "the performance of the database system is not optimized, more
is designed. " Database schema design is not as much as many people think of as a simple object corresponding to the implementation, but
A system engineering. To design a database that is both efficient and sufficient to meet business needs, with a clear, logical and simple relationship
The SCHEMA structure requires not only sufficient knowledge of the database system, but also a sufficient understanding of the business logic of the application system.