Database design refers to a given, given application environment, the construction of database model, database and its application system to meet the needs of various users. As an effective means for the development, management and service of information resources, the application of database technology has become more and more extensive, from small single transaction processing system to large information system, advanced database technology is used to maintain the security, integrity and sharing of system data. That's right. For a practical system, the design of the database table must follow the database theory, and at the same time, it must be able to use the development tools to achieve the functional requirements of users in various aspects.