About Oracle Deinstallation Options

The deinstall.bat command stops Oracle software, and removes Oracle software and configuration files on the operating system.

You can remove the following software using deinstall:

• Oracle Database

• Oracle Grid Infrastructure, which includes Oracle Clusterware and Oracle Automatic Storage Management (Oracle ASM)

• Oracle Real Application Clusters (Oracle RAC)

• Oracle Database Client

The deinstall command is available in Oracle home directories after installation. It is located in the ORACLE_HOME\deinstall directory.

The deinstallation tool uses the information you provide, plus information gathered from the software home to create a response file. You can alternatively supply a response file generated previously by the deinstall command using the –checkonly option, or by editing the response file template.

Note:

• You must run the deinstall command from the same release to remove Oracle software. Do not run the deinstall command from a later release to remove Oracle software from an earlier release. For example, do not run the deinstall command from the 21c Oracle home to remove Oracle software from an existing 12.2 Oracle home

• Starting with Oracle Database 12c Release 1 (12.1.0.2), the roothas.bat script replaces the roothas.pl script in the Oracle Grid Infrastructure home for Oracle Restart, and the rootcrs.bat script replaces the rootcrs.pl script in the Grid home for Oracle Grid Infrastructure for a cluster.

If the software in the Oracle home is not running (for example, after an unsuccessful installation), then the deinstallation tool cannot determine the configuration, and you must provide all the configuration details either interactively or in a response file.

In addition, before you run deinstall for Oracle Grid Infrastructure installations, if Grid Naming Service (GNS) is in use, then notify your DNS administrator to delete the subdomain entry from the DNS.