WINDOWs2000下安装ORACLE9I与10G

操作系统：windows2000 server

软件oracle9i+oracle10G102

步骤：（先装9i再装10g）

1、先安装oracle9i,完成后关闭所有服务。

2、安装oracle10G,安装的路径与9i路径不一致，完成。

3、重启系统（个人行为），修改oracle9i监听程序端口listener.ora（1522）并修改tnsnames.ora、snmp_ro.ora文件中的相关端口。

问题：

1、装完9i后发现可以登录，但点击时出现“ORACLE不可用”

方法：sqlplus /nolog
     conn sys/sys as sysdba
     startup
     执行以上命令后，就可以登入了

2、装完10G且修改好9i的监听程序端口后，进入9i同样出现“ORACLE不可用”，用一中的方法不行，执行tnsping orcl9i发现指向的10G的目录

方法一：我的电脑->属性->高级->环境变量->path;修改path值将"oracle9i\...\bin"放到"oracle10g\...\bin"前，重启系统再使用问题一的方法就可以了。

方法二：不修改path值，修改10g下的tnsnames.ora文件，将9i中的配置拷入10的tnsnames.ora，同样修改9i的tnsnames.ora文件。再使用命令启动9i数据库(修改后的tnsnames.ora文件见下面)
     sqlplus /nolog
     connsys/sys@orcl9ias sysdba
     startup

以上只为个人做参考用，感谢天涯浪子的帮助

10G的tnsnames.ora
====================================================

ORCL10G =
   (DEscrīptION =
     (ADDRESS = (PROTOCOL = TCP)(HOST = xt-b271dac81b07)(PORT = 1521))
     (CONNECT_DATA =
       (SERVER = DEDICATED)
       (SERVICE_NAME = orcl10g)
     )
   )
ORCL9I =
   (DEscrīptION =
     (ADDRESS_LIST =
       (ADDRESS = (PROTOCOL = TCP)(HOST = xt-b271dac81b07)(PORT = 1522))
     )
     (CONNECT_DATA =
       (SERVICE_NAME = ORCL9I)
     )
   )
EXTPROC_CONNECTION_DATA =
   (DEscrīptION =
     (ADDRESS_LIST =
       (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
     )
     (CONNECT_DATA =
      (SID = PLSExtProc)
       (PRESENTATION = RO)
     )
   )

====================================================

9i的tnsnames.ora
====================================================

ORCL10G =
   (DEscrīptION =
     (ADDRESS = (PROTOCOL = TCP)(HOST = xt-b271dac81b07)(PORT = 1521))
     (CONNECT_DATA =
       (SERVER = DEDICATED)
       (SERVICE_NAME = orcl10g)
     )
   )
ORCL9I =
   (DEscrīptION =
     (ADDRESS_LIST =
       (ADDRESS = (PROTOCOL = TCP)(HOST = xt-b271dac81b07)(PORT = 1522))
     )
     (CONNECT_DATA =
       (SERVICE_NAME = ORCL9I)
     )
   )
INST1_HTTP =
   (DEscrīptION =
     (ADDRESS_LIST =
       (ADDRESS = (PROTOCOL = TCP)(HOST = xt-b271dac81b07)(PORT = 1522))
     )
     (CONNECT_DATA =
       (SERVER = SHARED)
       (SERVICE_NAME = MODOSE)
       (PRESENTATION =http://HRService)
    )
   )
EXTPROC_CONNECTION_DATA =
   (DEscrīptION =
     (ADDRESS_LIST =
       (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
     )
     (CONNECT_DATA =
       (SID = PLSExtProc)
       (PRESENTATION = RO)
     )
   )