How to upgrade an ArcSDE Oracle geodatabase?
let’s see on how to upgrade the sde geodatabase
1. in arc catalog, right-click on the connection and go to properties. You can check the upgrade status, if the Upgrade geodatabase option is grayed out, it means your geodatabase is currently upgraded to the latest release of your ArcGIS Desktop. So no need to upgrade. If it is not grayed out, you can upgrade.
2. Use the Upgrade tool.
make sure you donot have any users connected before upgrading and you have a full backup of the database.
as I said my geodatabase is at current release so it cannot be upgraded further.
so you can upgrade by any of these two ways
for further videos lets proceed