The "Oracle Autonomous Database" (B) offers the highest degree of security and governance with a
self-service experience. It includes automated security features (e.g., TDE, network encryption), self-
patching, and fine-grained access controls, all managed by Oracle, while allowing users to provision
and manage databases independently. "Exadata Cloud Service" (A) provides high performance but
requires more manual oversight. "Oracle Database Cloud Service" (C) offers flexibility but less
automation, and "Oracle MySQL Database Service" (D) lacks the same level of autonomous security.
Oracle’s documentation positions Autonomous Database as the pinnacle of secure, self-service
deployment.
Reference: Oracle Autonomous Database Security Guide, OCI Database Options Overview.
