9 Removing Oracle Database Software
Learn how to remove Oracle software and configuration files.
You can remove Oracle software either by using Oracle Universal Installer with the deinstall option, or by using the deinstallation tool (deinstall) that is included in Oracle homes. Oracle does not support the removal of individual products or components related to the specified Oracle home. It includes information about removing Oracle software using the deinstallation tool.
The deinstallation tool removes standalone Oracle Database installations, Oracle Clusterware and Oracle Automatic Storage Management (Oracle ASM) from your server, as well as Oracle Real Application Clusters (Oracle RAC), and Oracle Database client installations.
Oracle recommends that you use the deinstallation tool to remove the entire Oracle home associated with the Oracle Database, Oracle Clusterware, Oracle ASM, Oracle RAC, or Oracle Database client installation. Oracle does not support the removal of individual products or components.
Caution:
If you have a standalone database on a node in a cluster and you have multiple databases with the same global database name (GDN), then you cannot use the deinstallation tool to remove one database only.
Caution:
You must use the deinstallation tool from the same release to remove Oracle software. Do not run the deinstallation tool from a later release to remove Oracle software from an earlier release. For example, do not run the deinstallation tool from the 12.2.0.1 installation media to remove Oracle software from an existing 11.2.0.4 Oracle home.
- About Oracle Deinstallation Options
Using Oracle Universal Installer with the deinstall option, or running the deinstallation tool from the Oracle home, stops and removes Oracle software and it's components, such as database and configuration files for a specific Oracle home. - Example of Running the Deinstallation Tool
If you perform a deinstallation by running thesetup.execommand with the-deinstalloption from the installation media, then the help displays. - Deinstallation Examples for Oracle Database
Examples of running deinstallation using OUI (runinstaller) or as a standalone tool (deinstall). - Deinstallation Response File Example for Oracle Database
You can run the deinstallation tool with the-paramfileoption to use the values you specify in the response file. - Deinstallation Response File Example for Oracle Grid Infrastructure
You can run the deinstallation tool with the-paramfileoption to use the values you specify in the response file. - Downgrading Oracle Restart
Use this procedure to deconfigure and downgrade Oracle Restart, or to troubleshoot Oracle Restart if you receive an error during installation.