1.关闭数据库

SQL> shutdown immediate

2.关闭数据库监听

lsnrctl stop

3.使用./deinstall 删除数据库,在oracle用户下操作一下命令

[oracle@togogo ~]$ cd /u01/app/oracle/product/11.2.0/db_1/deinstall/

[oracle@togogo deinstall]$ ls

bootstrap.pl deinstall deinstall.pl deinstall.xml jlib readme.txt response sshUserSetup.sh

[oracle@togogo deinstall]$ ./deinstall

		.....................................
	
		####################### CLEAN OPERATION SUMMARY #######################
	
		Updated Enterprise Manager configuration for database orcl
	
		Successfully de-configured the following database instances : orcl
	
		Following Single Instance listener(s) were de-configured successfully: LISTENER
	
		Cleaning the config for CCR
	
		As CCR is not configured, so skipping the cleaning of CCR configuration
	
		CCR clean is finished
	
		Successfully detached Oracle home '/u01/app/oracle/product/11.2.0/db_1' from the central inventory on the local node.
	
		Successfully deleted directory '/u01/app/oracle/product/11.2.0/db_1' on the local node.
	
		Successfully deleted directory '/u01/app/oracle/oraInventory' on the local node.
	
		Oracle Universal Installer cleanup was successful.
	
		Run 'rm -rf /etc/oraInst.loc' as root on node(s) 'togogo' at the end of the session.
	
		Run 'rm -rf /opt/ORCLfmap' as root on node(s) 'togogo' at the end of the session.
	
		Oracle deinstall tool successfully cleaned up temporary directories.
	
		#######################################################################
	
		############# ORACLE DEINSTALL & DECONFIG TOOL END #############

4.删除相关的目录或文件夹切换到root用户删除

把/usr/local/bin 下的三个文件夹 dbhome oraenv coraenv 删掉

cd /usr/local/bin

rm -f dbhome

rm -f oraenv

rm -f coraenv

把/etc 下面的 oratab 和 orainst.loc 删掉

cd /etc

rm -f oratab

rm -f oraInst.loc

把/opt 下面 ORCLfmap 删掉

cd /opt

rm -fR ORCLfmap

５、删除相关用户和组

把 oracle 用户和 oinstall 和 dba oper 删掉

必须先删 oracle 用户

userdel -r oracle

groupdel oinstall

groupdel dba

groupdel oper

6、删除家目录

rm -rf /u01

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删除oracle数据库软件的方法

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