Oracle database uninstall tutorial
To uninstall the Oracle database: Stop the Oracle service, remove the Oracle instance, delete the Oracle home directory, clear the registry key (Windows only), and delete the environment variables (Windows only). Please back up the data before uninstalling.

Oracle Database Uninstall Tutorial
Uninstall process
-
Stop Oracle Services
- Windows: In Service Manager, stop all Oracle-related services.
- Linux: Run
systemctl stop oracle-xeorsystemctl stop oracle-db.
-
Remove Oracle instance
- Windows: Uninstall an Oracle instance using Oracle Universal Installer (OUI).
- Linux: Run
cd /u01/app/oracle/product/11.2.0/db_1(Oracle installation directory), and then run./deinstall -force.
-
Remove Oracle Home Directory
- Windows: Delete the Oracle home directory located in
C:\oracle\product\11.2.0. - Linux: Delete the entire directory of
/u01/app/oracle.
- Windows: Delete the Oracle home directory located in
-
Clear registry key (Windows only)
- Run the registry editor (regedit).
- Delete all Oracle-related items under
HKEY_LOCAL_MACHINE\SOFTWARE\Oracle.
-
Delete environment variables (Windows only)
- In Control Panel -> System -> Advanced -> Environment Variables, delete all environment variables that contain Oracle paths.
Things to note
- Before uninstalling, make sure that all important data is backed up.
- If you encounter any problems, see the Oracle documentation or contact Oracle Support.
- After uninstalling, you need to restart your computer to complete the process.
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