《数据库原理及应用》
课程设计报告
目录
一、需求分析 ....................................................................................................................1
1.1 数据字典 ........................................................................................................................1
1.2 数据流图 ........................................................................................................................1
二、概念结构设计.............................................................................................................2
2.1 E—R 图的设计.................................................................................................................2
2。1.1 分 E—R 图 ............................................................................................................2
2。1。2 初步 E-R 图 ........................................................................................................3
三、逻辑结构设计.............................................................................................................3
3.1 关系模型 ........................................................................................................................3
3.2 数据模型的优化 ............................................................................................................4
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