How can you call a created and activated database procedure?

A created and activated database procedure can indeed be called by another database procedure. This capability is essential within a database environment, particularly for maintaining modularity and reusability of code. When one procedure can invoke another, it allows for complex operations to be broken down into simpler components, enabling developers to maintain and manage their code more effectively.

In the context of database development, calling one procedure from another is a common practice and is often referred to as "procedure chaining." This method provides the advantage of encapsulating specific tasks within individual procedures, which can then be reused across different parts of the application without rewriting code, enhancing development efficiency and reducing potential errors.

The other options, while they might have their purposes in specific contexts, do not represent how stored procedures are typically invoked within the architecture of a database environment. For instance, executing directly through SQL commands is generally used for standalone queries rather than inter-procedure calls, while standalone reports and web service interfaces typically focus on accessing data or functionalities rather than internal procedure relationships. Thus, the option referring to calling from another procedure accurately captures a fundamental aspect of how database procedures operate.