Oracle Cloud Infrastructure Functions are fully managed, multi-tenant, highly scalable, on-demand, Functions-as-a-Service platform. Oracle Cloud Infrastructure Functions are built on enterprise-grade Oracle Cloud Infrastructure and powered by the Fn Project open-source engine. Use Oracle Cloud Infrastructure Functions also referred to as OCI Functions, to focus on developing code to meet the business requirements.

See Overview of Functions for more information.

AWS Lambda is a serverless, event-driven compute service that lets you run code for virtually any application or backend service without provisioning or managing servers.

See AWS Lambda for more information.

Azure Function is a serverless compute service that enables users to run event-triggered code without provisioning or managing infrastructure.

Please review the Azure documentation at the links below:

• Azure Functions overview

• Create your first function in the Azure portal

External procedures are functions written in a third-generation language (C, for example) and callable from within PL/SQL or SQL as if they were a PL/SQL routine or function.

See What Is an External Procedure? for more information.