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数据库基础<一)基本概念

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Release： 2016-06-07 15:22:35
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一、名词 数据：Data 数据库：DataBase, DB 数据库管理系统：DataBase Management System, DBMS 二、数据模型 1、数据模型分类 下面为一个实例的 E-R 图： 供应商、项目和零件之间是多对多的联系： m:n:p 仓库与零件之间是多对多的联系：m:n 仓库与职工之间

一、名词

数据：Data

数据库：DataBase, DB

数据库管理系统：DataBase Management System, DBMS

\

二、数据模型

1、数据模型分类

\

下面为一个实例的 E-R 图：

\

供应商、项目和零件之间是多对多的联系： m:n:p

仓库与零件之间是多对多的联系：m:n

仓库与职工之间是一对多的联系：1:n

职工之间有领导-被领导关系，具有一对多的联系：1:n

2、数据模型的组成要素

\

三、数据系统模式

\

Related labels：
amp data basic concept Base data database
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