数据库技术是信息资源管理最有效的手段。数据库设计是指对于一个给定的应用环境，构造最优的数据库模式，建立数据库及其应用系统，有效存储数据，满足用户信息要求和处理要求-Database technology is the information resources management is the most effective means. The database design is for a given application environment, the optimal structure of database model, the establishment of database and its application system, effective data storage, meet the user s information requirement and processing requirements