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This article mainly introduces the characteristics of the database, the introduction in the article is very detailed, has a certain reference value, interested friends must read it!

The four characteristics of the database are: 1, the overall data structure;2, the high degree of data sharing;3, the high independence of data;4, a high degree of data control ability. Database system refers to the system composition after introducing database into computer system.

Operating environment: windows 10 system, thinkpad t480 computer.

Database System (DBS) refers to the system composition after introducing database into computer system, which consists of computer hardware, operating system, DBMS, DB, application program and user, database development and management personnel.

DBS has four main characteristics:

1. Overall data structuring

Any data in the database does not belong to any application, the data is public, and the structure is comprehensive. In the database, the number of data files is limited and fixed, but the application of database system is unlimited.

Benefits: Structuring the overall data reduces or even eliminates unnecessary data redundancy, thus saving storage space for the overall data and avoiding data inconsistencies and inconsistencies (data does not meet specified constraints).

2. High degree of data sharing

The data and the logical structure of the data are stored in the database at the same time, and when the data is displayed, the logical structure of the data can be displayed at the same time; the overall data of the entire organization is comprehensively considered, and the overall data is structured. Therefore, DBS has a high degree of data sharing.

Benefits: Legitimate users can easily access and use the data in the database without worrying about inconsistencies and inconsistencies. The data in the database can adapt to the reasonable requirements of various legitimate users and various application requirements, and can be easily expanded to new applications.

High independence of data

Data independence refers to the association between data and applications. The data and structure of the data are stored in the database (on external storage) and managed by the DBMS. Applications store neither data nor the logical structure of data.

Physical independence: When the way data is stored in a database changes, the DBMS can appropriately change the way it transforms the data so that the logical structure of the user's data remains unchanged, and so does the application that processes the data.

Logical independence: When the logical structure of the data in the database changes, the DBMS can appropriately change the way the data is converted, and the logical structure of the user facing the data remains unchanged.

Benefits: Data and programs are independent of each other, which can facilitate the preparation of various applications and greatly reduce the maintenance of applications.

4. High degree of data control ability

a, higher security

b, better data integrity

C, strong concurrency control ability

d, Strong data recovery capability

The above DBMS functions ensure the normal operation of the database and greatly simplify the application.

The above is all the contents of this article "What are the characteristics of the database?" Thank you for reading! Hope to share the content to help everyone, more relevant knowledge, welcome to pay attention to the industry information channel!

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