Oracle | Database Uninstall

Oracle Uninstall Version 12.2

Linux: Oracle Enterprise or RedHat
-- connect as root su - cd $ORACLE_BASE rm -r * -- drop the oracle installation su oracle lsnrctl stop sqlplus / as sysdba SQL> shutdown abort SQL> exit /* do not execute this next command for any purpose other than totally removing the Oracle installation and all of its subdirectories. If you do this and make a mistake you will need a full file system backup to recover */ rm -rf /app/oracle -- drop the oracle user userdel -r oracle -- drop the oinstall group groupdel oinstall -- drop the operator group groupdel oper -- drop the dba group groupdel dba -- drop the sysbackup group groupdel sysbackup -- drop the sysdg group groupdel sysdg -- drop the syskm group groupdel syskm -- drop the directory containing the inventory rm /etc/oratab rm /etc/oraInst.loc

Windows Desktop and Server Operating Systems
-- connect as local admin First try to do so with the Oracle Universal Installer. If that does not work then: shutdown all Oracle related services and change them to disabled. Remove the Oracle directory and all of its files and subdirectories. If you are blocked due to file locking remove all you can, reboot, and then remove the rest. Remove the Oracle directory under PROGRAM FILES and all of its subdirectories and files. Go into the registry and remove My Computer/HKEY_LOCAL_MACHINE/SOFTWARE/ORACLE only if you know what you are doing. If not, and you mess it up, I am not responsible so be very very careful.