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HomeDatabaseOracleHow to uninstall the oracle database cleanly

Guide to clean uninstallation of Oracle database: Stop Oracle service View dependencies Uninstall Oracle main program Delete Oracle Home directory Delete registry keys Delete environment variables Clear disk fragments Restart computer

How to uninstall the oracle database cleanly

Oracle Database Clean Uninstallation Guide

How to uninstall the Oracle database?

To cleanly uninstall the Oracle database, you can follow the steps below:

1. Stop all Oracle services

Run as administrator Command prompt and execute the following command:

<code>net stop "OracleServiceORCL"
net stop "OracleOraDB11g_home1TNSListener"</code>

2. View dependencies

Use the Dependency Walker tool to check the dependencies of Oracle components. This will help you identify all components that need to be uninstalled.

<code>D:\>\dependwalker.exe oracle.exe</code>

3. Uninstall the Oracle main program

Uninstall the Oracle main program through the control panel or a third-party uninstall tool (such as Revo Uninstaller).

4. Delete the Oracle Home directory

Manually delete the Oracle home directory (usually located at C:\oraclexe) and any other related directories (such as C:\Program Files\ Oracle).

5. Delete registry keys

Use Registry Editor to delete the following registry keys:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Oracle
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleServiceORCL
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleOraDB11g_home1TNSListener

6. Delete environment variables

Delete the following environment variables:

  • ORACLE_BASE
  • ORACLE_HOME
  • PATH (contains the path to the Oracle executable file)

7. Clear Disk Defragmentation

Run Disk Defragmentation to clean up any fragments left behind after Oracle was uninstalled.

8. Restart the computer

Restart the computer to apply the changes and completely remove the Oracle database.

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