试题与答案

S-Designer是一种可视化的数据库设计工具,它的后续版本是Power-Desi

题型:单项选择题

题目:

S-Designer是一种可视化的数据库设计工具,它的后续版本是Power-Designer,使用它可以完成如下的________功能。 Ⅰ.可以画数据流图(DFD) Ⅱ.可以画实体联系图(E-R图),即设计概念数据模型(CDM) Ⅲ.可以从概念数据模型(CDM)生成物理数据模型(PDM) Ⅳ.可以从现存数据库逆向生成物理数据模型(PDM) Ⅴ.可以从物理数据模型(PDM)逆向生成概念数据模型(CDM)

A.Ⅰ,Ⅱ和Ⅲ

B.Ⅰ,Ⅱ和Ⅳ

C.Ⅰ,Ⅱ和Ⅴ

D.都可以

答案:

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