Question

The levels in which the three
schema architecture can be defined
includes​

Answer 1

Answer:

A framework for managing access to data that involves three layers or schemas: the external or programming view, the conceptual or data administration view, and the internal or database administration view.

explanation

Techopedia explains Three-Schema Architecture

The first of the three levels is called the external level or user level. This is the view of the relational database that end users see, and it involves a high level of abstraction. The second level is the logical schema or conceptual level, where designers work.

Answer 2

QUESTION:-

The levels in which the three schema architecture can be defined includes

ANSWER:-

The levels in which the three schema architectures can be defined include Internal Schema, Conceptual Schema and External Schema

• A framework for regulating access to data involves three levels or schemas the external known as the programming view, the conceptual known as the data administration view, and the internal know as database administration view.

• Internal Schema level is the lowest level in the three-level architecture. It is also called the Physical level. The internal level interprets how data is certainly stored in the database.

• Conceptual Schema level is at a higher level than the Internal Schema level. It is also called the Logical Schema level. It interprets how the database seems to the users conceptually and the connections between different data tables.

• External Schema level is the highest level in the three-level architecture and is nearest to the users. It is also called the view level. The external schema level simply shows the appropriate database subject to the users in the aspect of views and conceals the rest of the data.

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