A Brief Introduction to the data room Charging System

 After completing the student system, I started to charge the data center system. As I just finished the "Information System Development and Management" test a few days ago, I wrote a lot about demand analysis and system analysis in this book, this part of content was originally learned during soft working hours. Due to the reason of self-testing, we are now in advance, so before we build a data center charging system, I also tried to draw a E-R for my analysis, because it is the first painting, painting is not very good. I hope you will criticize and correct it here.

Since the E-R diagram is used here, I will introduce the E-R diagram briefly first. The entity-relational diagram of the E-R (entity-relationship divisor) is the conceptual pattern used to describe the static data structure. It summarizes the basic structure of data with three basic concepts: entity, relation, and attribute. It is widely used in database design and is often used together with data flowcharts and structure charts. Because the first two focuses on the processing and circulation of descriptive information, there is a lack of methods to describe the static data structure.

Using graphs to analyze the system helps us understand the relationship between data and build a relatively good database. This will also help the system design, implementation, and maintenance in the future.