Oracle Enterprise Database Service is a managed

Cloud Computing Services provide information technology (IT) as a service over the Internet or dedicated network, with delivery on demand, and payment based on usage. Cloud computing services range from full applications and development platforms, to servers, storage, and virtual desktops. [Source: Dell]

and

Cloud storage is a service model in which data is transmitted and stored on remote storage systems, where it is maintained, managed, backed up and made available to users over a network (typically the internet). [Source: TechTarget]

platform that allows you to securely run Oracle Database workloads in Oracle Cloud Infrastructure (OCI). Flexible virtual machine shapes and consumption-based pricing simplifies meeting application performance and availability requirements.