Which components of the schema architecture proposed by ansi, Database Management System

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What are three components of the schema architecture proposed by ANSI/SPARC?

The three component schema architecture proposed by ANSI/SPARC is as given below:

External schema: An external view is abstract representation of some portion of total database.

Conceptual schema: A conceptual view is the logical representation of the database in its entity.

Internal schema: The internal schema is database as it is physically stored.

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