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This article is about what the conceptual model of a database in a computer network is independent of. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

The conceptual model of the database is independent of "specific machines and DBMS". Conceptual model is used to model the information world, which abstracts the objective objects of the real world into some kind of information structure, which does not depend on the specific computer system and is not a data model supported by a certain DBMS; it is actually an intermediate level from the real world to the machine world.

The conceptual model of the database is independent of ().

A. specific machines and DBMS

B. entity contact diagram

C. the information world

D. Relational model

Answer: a

Analysis: conceptual model is used to model the information world, which abstracts the objective objects of the real world into some kind of information structure. This structure does not depend on the specific computer system and is not a data model supported by a certain DBMS. It is actually an intermediate level from the real world to the machine world.

Database conceptual model

The combination of object-oriented method and database technology can make the analysis and design of database system consistent with people's understanding of the objective world to the greatest extent.

The database conceptual model is actually an intermediate level from the real world to the machine world. The database conceptual model is used for the modeling of the information world, which is the first layer of abstraction from the real world to the information world, a powerful tool for database designers to design databases, and a language for communication between database designers and users.

The establishment of a data conceptual model is a logical model established after analysis and summary by observing the collection, transmission, processing, storage and output of data in the system from the point of view of data. it is mainly used to describe the various states of the data in the system.

This model is not concerned with the specific implementation (such as how to store) and details, but is mainly concerned with the state of the data at various stages of processing in the system. In fact, data flow graph is also a data conceptual model.

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