Question

The capability to use user-defined types as built-in types is known as
Data abstraction
a
Extensibility
Polymorphism

Inheritance​

Answer 1

Answer:

User-defined datatypes use the built-in datatypes and other user-defined datatypes as the building blocks for datatypes that model the structure and behavior of data in applications. User-defined types are schema objects. Their use is subject to the same kinds of administrative control as other schema objects.

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