Reference:
https://docs.cloud.oracle.com/en-us/iaas/Content/Database/Concepts/overview.htm

Explanation
You can copy objects to other buckets in the same region and to buckets in other regions.
You must have the required access to both the source and destination buckets when performing an object copy.
You must also have permissions to manage objects in the source and destination buckets.
Because Object Storage is a regional service, you must authorize the Object Storage service for each region carrying out copy operations on your behalf. For example, you might authorize the Object Storage service in region US East (Ashburn) to manage objects on your behalf. Once you authorize the Object Storage service, you can copy an object stored in a US East (Ashburn) bucket to a bucket in another region.
You can use overwrite rules to control the copying of objects based on their entity tag (ETag) values.
Specify an existing target bucket for the copy request. The copy operation does not automatically create buckets.

Explanation
The database name must be unique among all Autonomous Data Warehouses and Autonomous Databases in your tenancy in the same region.

Terminating an Autonomous Transaction Processing database permanently deletes the instance and removes all automatic backups. You cannot recover a terminated database.
the maximum number of CPUs and maximum storage capacity that can be provisioned in Oracle Autonomous Database In the current release up to 128 CPUs and 128TB can be provisioned from the cloud console.
Customers requiring more resources need to call their Oracle account team

References:
https://cloud.oracle.com/iaas/whitepapers/best-practices-for-iam-on-oci.pdf
You manage the following types of credentials with Oracle Cloud Infrastructure IAM: Console password: For signing in to the Console, which is the user interface for interacting with Oracle Cloud Infrastructure API signing key (in PEM format): For sending API requests, which require authentication Swift password: For using a Swift client with Recovery Manager (RMAN) to back up an Oracle Database System (DB System) database to Object Storage