Teach you how to modify the Oracle instance name

Oracle is a very powerful database software that is widely used in enterprises. When using Oracle, we may need to modify the instance name. This article will teach you how to modify the Oracle instance name.

First, open the cmd command line window and enter the following command:

set ORACLE_SID=旧实例名

The function of this command is to set the value of the environment variable ORACLE_SID to the old instance name. Next, use the following commands to shut down the instance:

sqlplus / as sysdba
shutdown immediate

These commands will use the SQL*Plus tool to log into the Oracle database and shut down the instance. After closing the instance, we need to modify the instance name in the init old instance name.ora file. We can find the file using the following command:

select value from v$parameter where name='spfile';

This command will query the v$parameter view and return the value of spfile. We can find the init old instance name.ora file in the path and open the file using a text editor. In this file, we need to modify the following two lines:

*.control_files='+数据文件存放路径/旧实例名/控制文件名.ctl'
db_name=旧实例名

Replace the old instance name in these two lines with the new instance name and save the file.

Next, we need to modify the instance name in the Windows registry key. Open the Registry Editor and find the following path:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleService旧实例名

Under this path, replace the old instance name in the path with the new instance name and save the registry.

Finally, restart the Oracle service to complete the modification of the instance name. Enter the following command in the cmd command line window:

net start OracleService新实例名

This command will start the Oracle service of the new instance name.

In short, modifying the Oracle instance name requires multiple steps. Be careful when operating to avoid mistakes. If you need to modify the instance name, follow the steps above.

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