Complete uninstall of Oracle 12c operation steps on Windows7

Complete uninstall of Oracle 12c operation steps on Windows7


1. Close all Oracle Services and press "Win+r" to Run "services.msc" to find all services beginning with Oracle (oraclevsswriterorcl+oracleserviceorcl+ ORACLEORADB12HOME1TNSLISTENER+ORACLEORADB12HOME1MTSRECOVERYSERVICE+ORACLEJOBSCHEDULERORCL), click Stop.


2. Uninstall the Oracle program using Oracle's own software. Click "Start", "program", "Oracle-oradb12c_home1", "Oracle Installation Products", "Universal Installer", click "Uninstall Product" button, tick "Oracle home Directory "-" oradb12c_home1 "-" Oracle Database 12c 12.1.0 "After the last item click" Delete ", after deleting and then check" Oracle home Directory "-" ORADB12C_HOME1 "Item and click" Delete ". Click Close when the uninstallation is complete.


3. Open the Registry program, press "Win+r", enter "regedit", "return", delete the following path/key/value:


3.1:hkey_local_machine\system\currentcontrolset\services\ Delete all service names starting with Oracle under this path oraclevsswriterorcl+ ORACLESERVICEORCL+ORACLEORADB12HOME1TNSLISTENER+ORACLEORADB12HOME1MTSRECOVERYSERVICE+ORACLEJOBSCHEDULERORCL).


3.2:hkey_local_machine\software\oracle deletes the Oracle directory, which registers the software installation information for the Oracle database.


3.3:hkey_users\s-1-5-21-1302337871-3542686902-227442817-500\software\microsoft\windows\currentversion\explorer \startpage\newshortcuts Delete all shortcuts that contain Oracle.


3.4:hkey_local_machine\system\currentcontrolset\services\eventlog\application deletes all entries in the registry that begin with Oracle.


4. Delete environment variables for Oracle Related settings: Right-click My Computer--Properties--advanced--Environment variables: Remove the following environment variables or values on the desktop


4.1 Delete the Nls_lang environment variable, the default value is simplified Chinese_china. Zhs16gbk
4.2 Delete oracle_home environment variable, default value is C:\app\Administrator\product\12.1.0\dbhome_1
4.3 Delete oracle_sid environment variable, default value is ORCL
4.4 Delete the C:\app\Administrator\product\12.1.0\dbhome_1\bin in the PATH environment variable;
4.5 Delete tns_admin environment variable, default value is C:\app\Administrator\product\12.1.0\dbhome_1\NETWORK\ADMIN


5. Restart the operating system.


6. Delete the Oracle program-related directories after rebooting. Includes the installation directory (C:\APP) + System configuration directory (C:\Program files\oracle).


7. After restarting, delete the Oracle item (C:\Users\Administrator\Oracle) under the Start menu.


At this point, Oracle under Windows7 is completely uninstalled and will not report any errors when re-running the Oracle installation.

Complete uninstall of Oracle 12c operation steps on Windows7