What are the main steps in database design?

Steps: 1. Collect and analyze requirements to obtain a data dictionary and data flow diagram; 2. Comprehensive, summarize and abstract user requirements to form a conceptual model; 3. Convert the conceptual structure into a data model; 4. Design the physical structure of the database; 5. Establish the database, compile and debug applications, and organize data into the database; 6. Evaluate, adjust and modify the database system.

#The operating environment of this article: Windows 7 system, Dell G3 computer.

What are the main steps in database design?

Database Design refers to constructing the optimal database model for a given application environment, establishing the database and its application system, so that it can effectively store data and meet various needs. User's application needs (information requirements and processing requirements). In the field of databases, various systems that use databases are often collectively referred to as database application systems.

Database design is the technology for establishing databases and their application systems, and is the core technology in the development and construction of information systems. Due to the complexity of the database application system, in order to support the operation of related programs, the database design becomes extremely complex. Therefore, the optimal design cannot be achieved overnight, but can only be a process of "repeated exploration and gradual refinement", that is, planning and the process of structuring data objects in a database and the relationships between these data objects.

Steps of database design

(1) Requirements analysis stage: Requirements collection and analysis to obtain data dictionary and data flow diagram.

(2) Conceptual structure design stage: synthesize, summarize and abstract user needs to form a conceptual model, represented by an E-R diagram.

(3) Logical structure design stage: Convert the conceptual structure into a data model supported by a certain DBMS.

(4) Database physical design stage: Select a physical structure that is most suitable for the application environment for the logical data model.

(5) Database implementation stage: establish database, compile and debug application programs, organize data storage, and program trial run.

(6) Database operation and maintenance stage: evaluate, adjust and modify the database system.

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