Oracle学习笔记：Chapter 01--Oracle Architectural Components
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
Oracle学习笔记：Chapter 02--Oracle Architectural Components
Linux环境下Oracle版本升级(10.2.0.1-10.2.0.4)
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