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This article will explain in detail about the role of databases in computer applications. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

The functions of database in computer applications are: 1, to achieve data sharing; 2, to reduce data redundancy; 3, data independence; 4, data centralized control; 5, data consistency and maintainability to ensure data security and reliability; 6, fault recovery.

A database is a warehouse where data is stored. It has a large storage space and can store millions, tens of millions and hundreds of millions of pieces of data. However, the database does not store the data at will, there are certain rules, otherwise the efficiency of the query will be very low. Today's world is an Internet world full of data, full of a large amount of data. That is, the Internet world is the data world. There are many sources of data, such as travel records, consumption records, web pages visited, messages sent, and so on. Except for text-type data, images, music, and sound are all data.

Database is a computer software system that stores and manages data according to data structure. The concept of a database actually has two meanings:

The main contents are as follows: (1) Database is an entity, it is a "warehouse" that can keep data reasonably, users store transaction data to be managed in this "warehouse", and the two concepts of "data" and "library" are combined to form a database.

(2) Database is a new method and technology of data management, which can organize data more appropriately, maintain data more conveniently, control data more closely and use data more effectively.

The role of the database:

1. Realize data sharing

Data sharing includes that all users can access the data in the database at the same time, including that users can use the database through the interface in various ways and provide data sharing.

2. Reduce the redundancy of data

Compared with the file system, because the database realizes data sharing, it avoids the establishment of application files by users. It reduces a large number of duplicate data, reduces data redundancy, and maintains data consistency.

3. Independence of data

The independence of data includes logical independence (the logical structure of the database and the application are independent of each other) and physical independence (the change of the physical structure of the data does not affect the logical structure of the data).

4. Centralized control of data

In the mode of file management, the data is in a decentralized state, and there is no relationship between different users or the same user in different processing. The data can be centrally controlled and managed by the database, and the organization of all kinds of data and the relationship between the data can be represented by the data model.

5. Data consistency and maintainability to ensure data security and reliability

It mainly includes: security control, integrity control, concurrency control, so that multiple access to data is allowed in the same time period, and abnormal interaction between users can be prevented.

6. Fault recovery

A set of methods are provided by the database management system, which can find and repair faults in time, so as to prevent data from being destroyed. The database system can recover the failure when the database system is running as soon as possible, which may be a physical or logical error. For example, data errors caused by misoperation of the system and so on.

This is the end of the article on "what is the role of database in computer applications". I hope the above content can be of some help to you, so that you can learn more knowledge. If you think the article is good, please share it for more people to see.

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