失物招领系统数据库设计VIP免费

目录失物招领系统数据库设计·········································································2一、系统需求分析··················································································2（一）问题背景··························································································2（二）系统总体目标····················································································2（三）系统主要功能····················································································2二、概念结构设计··················································································5（一）标示实体集·······················································································5（二）标示联系集：····················································································5（三）标示属性集·······················································································5三、逻辑结构设计··················································································8（一）初始关系模式····················································································8（二）数据模型的规范化··············································································8（三）调整后的关系模式的在数据库中具体实现···············································10四、物理结构设计················································································13（一）数据库系统选型················································································13（二）索引的设置······················································································13（三）安全性和用户权限设计······································································14五、系统实现描述················································································15六、小组成员介绍及分工···························...