Home Database Mysql Tutorial 2012年计算机二级Access辅导笔记之创建Access数据库

2012年计算机二级Access辅导笔记之创建Access数据库

Jun 07, 2016 pm 03:02 PM
access Level 2 create number notes computer Counseling

第三章建树Access 数据库 3.1设计 数据库 3.2建树 数据库 的体例 3.3习题 3.1 关系 数据库 设计体例 关系 数据库 中,数据表是最根基的对象,表的 口角,直接关系到 数据库 的效率以及对 数据库 管 理和维护,是以,起头成立 数据库 之前,用户须 先对 数据库 中的

第三章建树Access数据库

  3.1设计数据库

  3.2建树数据库的体例

  3.3习题

3.1 关系数据库设计体例

  关系数据库中,数据表是最根基的对象,表的

  口角,直接关系到数据库的效率以及对数据库

  理和维护,是以,起头成立数据库之前,用户须

  先对数据库中的数据表进行细心的剖析和设计.

  好比那些数据存放在一张表中,每个字段的名,

  字段属性的设计,一个数据库中包含几张表,与

  表之间的联系等

  数据库表的设计体例

  学分

  课程名称

  课程号

  课程

  班级

  姓名

  学号

  学生

  实体属性

  实体

  实例:学生选课系统

  实体之间联系:多对多

  初步设计关系表

  85

  4

  多媒体

  2145

  计用05(3)

  王五

  055048011

  80

  4

  数据库手艺

  2304

  计用05(3)

  王五

  055048011

  76

  4

  多媒体

  2145

  计用05(2)

  张三

  055047006

  85

  4

  数据库手艺

  2304

  计用05(2)

  张三

  055047006

  成就

  学分

  课程名称

  课程编号

  班级

  姓名

  学号

  表3-1

  计用05(3)

  王五

  055048011

  计用05(2)

  张三

  055047006

  班级

  姓名

  学号

  4

  多媒体

  2145

  4

  数据库手艺

  2304

  学分

  课程名称

  课程编号

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