11 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.
• Deinstallation Response File Example for Oracle Grid Infrastructure for a Cluster
  You can run the deinstall command with the -paramfile option to use the values you specify in the response file.
• Deinstallation Example for Grid Infrastructure Management Repository
  Use this example to understand how to deinstall Grid Infrastructure Management Repository (GIMR) on an Oracle Standalone Cluster.
• Migrating Standalone Oracle Grid Infrastructure Servers to a Cluster
  If you have an Oracle Database installation using Oracle Restart (that is, an Oracle Grid Infrastructure installation for a standalone server), and you want to configure that server as a cluster member node, then complete the following tasks:
• Relinking Oracle Grid Infrastructure for a Cluster Binaries
  After installing Oracle Grid Infrastructure for a cluster (Oracle Clusterware and Oracle ASM configured for a cluster), if you need to modify the binaries, then use the following procedure, where Grid_home is the Oracle Grid Infrastructure for a cluster home:
• Changing the Oracle Grid Infrastructure Home Path
  After installing Oracle Grid Infrastructure for a cluster (Oracle Clusterware and Oracle ASM configured for a cluster), 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:
• Unconfiguring Oracle Clusterware Without Removing Binaries
  Running the rootcrs.sh command flags -deconfig -force enables you to unconfigure Oracle Clusterware on one or more nodes without removing installed binaries.