Change management with sandboxes
Oracle Eloqua offers you the ability to use a sandbox to test new or current functionality without affecting your production system. With this sandbox you have the ability to link a sandbox to your organization’s production instance. This can serve multiple purposes, such as testing campaigns, CRM integration changes or training, all without compromising the data and automation of your production instance.
Tip: The toolbar at the top of the page can help you differentiate between your production instance and sandbox instance.
Sandbox instance:
Production instance: 
Oracle Eloqua allows your production instance to be linked to more than one sandbox with no hard limit on the number of sandboxes. This offers you the comfort of safety and security of working on testing multi-business unit campaigns, integrations, or new product launches.
Note: This feature is available with the Enterprise trim or as an add-on to the Basic or Standard trims.