Application areas of databases

1, multimedia databases: These databases mainly store data related to multimedia, such as sound, image and video data. The biggest feature of multimedia data is that the data is continuous, and the amount of data is relatively large, the storage needs more space.

2, mobile database: this type of database is developed on the mobile computer system, such as notebook computers, palmtop computers. The biggest feature of the database is transmitted through the wireless digital communication network. Mobile database can get and access data anytime and anywhere, for some business applications and some emergencies have brought great convenience.

3, spatial database: This type of database is currently developing more rapidly. It mainly includes geographic information database (also known as geographic information system, that is, GIS) and computer-aided design (CAD) database. Geographic information database is generally stored with the map-related information data; computer-aided design database is generally stored in the spatial database of design information, such as machinery, integrated circuits and electronic equipment design drawings.

4, information retrieval system: information retrieval is based on user input information, from the database to find relevant documents or information, and find the information feedback to the user. Information retrieval field and the database is synchronized development, it is a typical online document management system or online library catalog.

5, distributed information retrieval: this type of database is with the development of the Internet and the database. It is generally used in the Internet and remote computer network systems. Especially with the development of e-commerce, this type of database development is more rapid.

Many network users (such as individuals, companies or businesses, etc.) in their own computers to store information, and at the same time want to use through the network to send e-mail, file transfer, remote login and others **** enjoy this information. Distributed information retrieval fulfills this requirement.

6, expert decision-making system: expert decision-making system is also part of the database application. As more and more data can be accessed online, especially the enterprise through these data can make better decisions about the development of the enterprise in order to make the enterprise run better. The development of artificial intelligence has led to a wider application of expert decision-making systems.

Expanded Information

The basic requirements for a database system are:

①Ability to ensure data independence. Data and program independence from each other is conducive to speeding up software development, saving development costs.

② Less redundant data, data **** enjoy a high degree.

③ The user interface of the system is simple, easy for users to grasp, easy to use.

4 can ensure that the system operates reliably and can be quickly eliminated in the event of failure; can protect the data from being accessed or destroyed by unauthorized persons; can prevent the generation of erroneous data, and can be detected in time once it is generated.

5 have the ability to re-organize data, can change the data storage structure or data storage location, in order to adapt to changes in the user's operating characteristics, to improve the frequent insertion and deletion of data caused by the organization of the data mess and spatial and temporal performance deterioration of the situation.

6 with modifiability and expandability.

7 can fully describe the intrinsic connection between the data.