14 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 the deinstall command.
• Oracle Deinstallation (Deinstall)
  You can run the deinstall command from an Oracle home directory after installation.
• Deinstallation Examples for Oracle Database
  Use these examples to help you understand how to run the deinstall command.
• Downgrading Oracle Restart
  Use this procedure to deconfigure and downgrade Oracle Restart, or to troubleshoot Oracle Restart installation errors.
• Removing an RPM-based Oracle Database Installation
  Use this procedure to remove and deinstall a database installed using the yum command.
• Deinstalling Previous Release Grid Home
  Use this procedure to deinstall the previous release Grid home.
• Changing the Oracle Restart Home Path
  After installing Oracle Grid Infrastructure for a standalone server (Oracle Restart and Oracle ASM configured for a standalone server), if you need to change the Grid home path, then use the following example as a guide to detach the old Grid home, and to attach a new Grid home: