The database design process includes six main stages: requirement analysis, conceptual structure design, logical structure design, physical structure design, database implementation, and database operation and maintenance. Database design refers to constructing an optimal database schema for a given application environment so that it can store data effectively and meet the application needs of various users.
The design content of database design includes: requirements analysis, conceptual structure design, logical structure design, physical structure design, database implementation and database operation and maintenance.
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Related introduction:
Database Design (Database Design) refers to a given application environment, structure The optimal database model, the establishment of database and its application system, so that it can store data effectively and meet the application requirements (information requirements and processing requirements) of various users. In the field of databases, various systems that use databases are often collectively referred to as database application systems.
Database design principles:
1. One-to-one design principles
In the software development process, it is necessary to follow the one-to-one relationship design principles to carry out data maintenance Work, by using this principle, we can minimize the occurrence of maintenance problems, ensure the smooth development of data maintenance work and reduce the difficulty of maintenance work. During this process, try to avoid large data and miscellaneous data, otherwise it will not only affect the progress of software development, but also increase the difficulty of work and affect the quality of its products. Therefore, designers must pay attention to this problem. At the same time, fully understand the inevitable connection between entities, and then achieve the goal of information and data dispersion, and on this basis, improve the work efficiency of the overall staff, and improve the reliability, scientificity, security and performance of software applications.
2. The unique naming principle
The application of the unique naming principle is to reduce the phenomenon of repeated naming and standardized naming in the database design process. By applying this principle, data redundancy can be reduced, data consistency can be maintained, and there is an inevitable corresponding relationship between keywords. The unique naming principle can exercise the staff’s proficiency in operating uppercase and lowercase letters, and is conducive to the development of standardized background code work.
3. Two-way use principle
The two-way use principle includes: transaction use principle and index function principle. First of all, the two-way usage principle is realized on the basis of the logical work unit model, which not only provides basic guarantee for non-transactional unit operation work, but also ensures that it can update and obtain data resources in a timely manner. The effective application of the principle of index function enables it to obtain more attribute column data information and to achieve flexible sorting. At present, the common index modes in the software market are: clustered index for multi-row retrieval and non-clustered index for single-row retrieval.
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