8 Removing Oracle Database Software
Use the deinstall command that is included
        in Oracle homes to remove Oracle software. Oracle does not support the removal of individual
        products or components.
               
Caution:
If you have a single-instance database on a node in a cluster, and if you have
                multiple databases with the same global database name (GDN), then you cannot use the
                    deinstall command to remove one database
                only.
                  
- About Oracle Deinstallation Options
You can stop and remove Oracle Database software and components in an Oracle Database home with thedeinstallcommand. - Oracle Deinstallation (Deinstall)
You can run thedeinstallcommand from an Oracle home directory after installation. - Deinstallation Examples for Oracle Database Client
Use these examples to help you understand how to run thedeinstallcommand.