Oracle PaaS is a subscription model within Oracle Cloud Infrastructure (OCI) that includes software license and support with compute, storage, and networking services.
You may want to start with our FAQ page about OCI. Most companies adopt OCI as a lift and shift strategy to get out of the data center business. Oracle allows customers to apply legacy, perpetually-licensed entitlements to OCI services via a 2:1 OCPU:Processor conversion akin to core factors. This model is called bring your own licensing, a.k.a., BYOL.
Oracle PaaS, or Platform-as-a-Service, is the same compute services with licensing included for those that don’t have adequate BYOL inventory.
For example, SKU B88847 is Exadata under a BYOL model at $.3226 per OCPU Per Hour. SKU B88592 is Exadata that includes Enterprise Database, RAC, etc., for $1.3441 per OCPU Per Hour.
The bottom line is that Oracle remains a legacy database company living off high-margin, on-premise software support. Conversely, most customers are wondering if and how long-standing annual software support can be reduced, and whether PaaS offers a path to that end.