Complete uninstall of Oracle 12c operation steps on Windows7 ____oracle

Complete uninstall of Oracle 12c operation steps on Windows7


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


2. Uninstall Oracle programs with Oracle software. Click "Start"-> "program"-> "oracle-oradb12c_home1"-> "Oracle Installation Products"-> "Universal Installer", click "Uninstall Products" button, check "Oracle home directory "-" oradb12c_home1 "-" Oracle Database 12c 12.1.0 "After the last item, click" Delete ", after the deletion and then check" Oracle home Directory "-" ORADB12C_HOME1 "Item, click" Delete ". Click Close when uninstall is complete.


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


3.1:hkey_local_machine\system\currentcontrolset\services\ Remove all Oracle-initiated service names under this path oraclevsswriterorcl+ ORACLESERVICEORCL+ORACLEORADB12HOME1TNSLISTENER+ORACLEORADB12HOME1MTSRECOVERYSERVICE+ORACLEJOBSCHEDULERORCL).


3.2:hkey_local_machine\software\oracle deletes the Oracle directory, which registers 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 deletes all shortcuts that contain Oracle.


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


4. Delete environment variables related to Oracle settings: Right-click My Computer--> properties on the desktop--> advanced--> environment variable: Delete the following environment variable or value


4.1 Delete the Nls_lang environment variable, the default value is simplified Chinese_china. Zhs16gbk
4.2 Delete the Oracle_home environment variable, the default value is C:\app\Administrator\product\12.1.0\dbhome_1
4.3 Delete the ORACLE_SID environment variable, the 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 the TNS_ADMIN environment variable, the default value is C:\app\Administrator\product\12.1.0\dbhome_1\NETWORK\ADMIN


5. Restart the operating system.


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


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


At this point, Oracle in Windows7 is completely uninstalled, and the Oracle installation is rerun without any errors.