通过E-R图设计关数据模型实验报告.docVIP

实验题目： 实验1 通过E-R图设计关系数据模型 实验地点： 重庆电力高等专科学校 指导教师： 倪宁 学生班级： 软件1212 学生学号： 201203100206 学生姓名： 陈虹宇 实验时间： 2013年3月19日 一、实验目的： 1．理解E-R图的三要素，会根据语义，绘制E-R图。 2．理解概念模型的意义，掌握关系模型的概念及表示方式。 3．会将E-R图转化为关系模式。（表）） （3）绘制出各实体属性E-R图 实体属性E-R图: 关系模式： 学生（学号，姓名，性别，出生年月，出生地，电话，入学总分） 班级（班号，班名，人数，学期，班主任，备注）））word很麻烦，基本无法胜任组织机构图、流程图、简单的机械制图、地图等等，visio是专门用来绘制这些图样的，很多模板是自动的，动态链接线自动连接，方便得很，效率高很多的Visio为专业的建模软件，他包含了UML的所需建模符号，而Word只是一些简单的绘图功能，并没有Visio所提供的更强大的功能。 yuan, an increase of 17.5%; local government general budget revenue of 500 million Yuan, ... Painting, model culture creates new Ma Church community, creating Lake scenic spot culture education base, received high evaluation from provincial and municipal discipline Inspection Commission, the peoples daily special report. Constantly promote independent Commission against corruption culture construction to rural extends, created established Dahlin rural industry Park independent Commission against corruption culture positions, formed has a support service low double excellent of members lead team, constantly perfect and established Park funds assets management, and village audit supervision, and villagers democratic financial, system, strengthening Park party, and Chief, and financial, full public, powerful to guarantees has new rural construction, by city rural style clean government inspection unit led of height evaluation. 　　Through the implementation of honest and clean government cultural construction, and effectively educate the broad masses of party members and cadres and consciously regulated behavior and discipline, honesty in politics and culture