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Oracle学习笔记：Chapter 01--Oracle Architectural Components

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第01讲：Chapter 01--Oracle Architectural Components.swf-----------------instance和database两个主要部分Oracle Server：包括

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Oracle学习笔记：Chapter 01--Oracle Architectural Components

[日期：2011-04-23] 来源：Linux社区  作者：siylz [字体：]

第01讲：Chapter 01--Oracle Architectural Components.swf
-----------------
instance和database两个主要部分

Oracle Server：包括instance+database

一个instance对应一个database

多个instance可以对应一个database：多对一的关系

一个database可以有多个instance来访问它。

集群rac是多个instance对应一个database

instance有内存块和后台进程组成

instance是活的东西，一断电就没有了。

Oracle Databse包含三种类型的文件：

Data files 、Control files、Online Redo Log files


Memory Structure包括两部分：systm Global Area(SGA) Program Global Area(PGA)
sga:就是在内存中的一个大的内存块

Oracle 数据库登录方式

sqlplus /nolog

SQL>conn /as sysdba

linux

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    • Oracle学习笔记：Chapter 02--Oracle Architectural Components

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