After fresh installation of your Oracle Database Software, you may need to install some oracle patches. This article describes how to use OPatch to install Oracle database patches on Windows platforms in an SAP environment. (on UNIX/Linux the steps is almost the same, just change the path).
1. Check your current oracle patch.
> cd %ORACLE_HOME\Opatch > opatch lsinventory
Take a note your current oracle patch installed
Update Oracle patch
1. Create temporary folder, put and extract the patch file
2. Change to patch folder and run command below to update patch
3. Verify that the patch is installed successfully.