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Oracle入门教程学习笔记

Jun 07, 2016 pm 05:12 PM
database

对于Oracle的学习与探讨,下面我是直接进行的,并没有对Oracle的历史进行讨论,因为在Oracle的官方有更好的解释,一下是我对Orac

对于Oracle的学习与探讨,下面我是直接进行的,并没有对Oracle的历史进行讨论,,因为在Oracle的官方有更好的解释,一下是我对Oracle知识的一个提炼

更多Oracle相关信息见Oracle 专题页面 ?tid=12

数据库基本概念: 数据库DB      数据库管理系统DBMS   数据库管理员DBA   数据模型

数据库DB

指以一定的组织方式存储在计算机存储设备上,能为多个用户所共享的与应用程序彼此独立相关数据的集合

它不仅包括描述事物的数据本身,而且还包括相关事物之间的关系

数据库管理系统DBMS

为数据库的建立,使用和维护而配置的软件,提供了安全性和完整性等统一控制机制

数据库管理系统一般具备数据库的定义、操作、查询及控制等功能

数据模型

用来描述世界中的事物及其联系,将数据库中的数据按照一定的结构组织起来,来反映事物本身及事物之间的各种联系

任何数据库管理系统都对应某种数据模型

1、层次型数据库

2、网状型数据库

3、关系型数据库(SQL Server)

4、对象关系型数据库(Oracle)

对象关系型数据库管理系统   ORDBMS   Object Relationship Database Manager System

Oracle数据库的主要特点:

支持多用户、大事务量的事务处理

数据完全性和完整性控制

支持分布式数据处理

可移植性

Oracle服务器

Oracle服务器提供开发、全面和综合的信息管理,它由Oracle数据库和Oracle实例组成

Oracle服务器

Oracle数据库                    Oracle实例

Oracle数据库:数据的集合,被视为一个逻辑单元

Oracle实例:管理数据库的后台进程和内存结构的集合

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