Who knows why database technology is the most effective means of information resource management?

Correct Answer: a

The three stages of database management technology are manual management, file system, and database system. There is no specialized software to manage the data in the manual management stage. The answer to this question is option A.

This problem can be explained in terms of the nature or concept of information systems. 1.From the concept of information systems, we know:

Computer information system is an application system for human-computer interaction for the purpose of providing information services, and management information system is a kind of classification of the purpose of information system in a narrow sense, no matter what kind of information system, its ultimate purpose is to provide information services. 2.How does an information system provide information services?

In the simplest or most straightforward terms, the user enters raw data into the system, manipulates commands, and obtains the resulting information. In this process, because the computer is an information processing machine based on binary operations, any information that needs to be processed by the computer must be formalized to a certain extent and expressed in the form of binary encoding, so there is a concept: data.

3.No matter what kind of information system, it is inseparable from the management of data"Data is a special format in which facts, concepts or instructions are described in a computer and are suitable for automatic transmission, translation (transformation) or processing using computers and their associated devices. "In this definition, the first emphasis is on what the data expresses a certain content, ie:"Facts, concepts, or directives", which is the semantics of the data; Second, data has a certain format (i.e., the syntax of the data), the purpose of which is to enable computers to automatically process, communicate, and translate.

4.Before the mid-60s of the 20th century, data was mainly managed by the file system, but this management method was limited by the limitations of the file system. Therefore, since the mid-to-late 60s, the database system, characterized by the centralized management and sharing of data, has gradually replaced the file system and become the main form of data management.

As a result, an integrated information system has emerged that serves multiple applications in one unit or a larger range, and its functions have expanded from simple transaction processing to planning, analysis, and decision-making, which is an important development of information systems. 5.Therefore, as far as the current information technology and information system architecture are concerned, database technology is the core technology of management information system.

The management information system is mainly a variety of information, need to use the database to store, and the system is mainly to add, delete, view, these are related to the database, when the amount of data is large, and the number of visits is large, it is more necessary to use database technology to optimize the database.

A database is a collection of data that is organized according to a data model and holds data in secondary storage. This data collection has the following characteristics: it is as non-duplicative as possible, serves multiple applications of a particular organization in the best possible way, its data structure is independent of the applications that use it, and the addition, deletion, modification and retrieval of data are managed and controlled by unified software.

From the perspective of development history, database is an advanced stage of data management, which is developed by document management systems.

The information content that database storage software needs is, of course, the core.

Database technology has the following characteristics: For enterprises or departments, data is organized with data as the center to form a comprehensive database that can be shared by various applications. Adopt a certain data model.

The data model should describe not only the characteristics of the data itself, but also the connections between the data. The data redundancy is small, and it is easy to modify and expand. Different applications obtain the required data from the database according to the processing requirements, which reduces the duplication of data storage, and also facilitates the addition of new data structures to facilitate the maintenance of data consistency.

There is a high degree of independence between the program and the data. With a well-supported interface, users can easily develop and use databases. Unified management and control of data provides data security, integrity, and concurrency control.

Do not explain the passing by of the computer department of China Soft.

Answer] :d database management technology is to develop on the basis of the database management system, because of the database management system, so the data management technology can develop rapidly.

Summary. Network cable transmission medium: coaxial cable, twisted pair, optical fiber. Coaxial cables and twisted pair cables transmit electrical signals, and optical fibers transmit optical signals. The three types of wired transmission** commonly used in computer networks are twisted pair, coaxial cable, and optical fiber.

Hurry up. Hello, the database management method of information has its unique advantages, and it cannot completely replace manual management.

The main contents of database management are: database establishment, database adjustment, database reorganization, database reconstruction, data band database security control, data integrity control and technical support for users. Establishment of the database:

The design of the database only provides the type of data, the logical structure, the connections, the constraints, and the storage structure.

Are double-crossed cables, coaxial cables, optical fibers, etc. all transmission media for networks?

Wired transmission media: coaxial cable, twisted pair, optical fiber. Coaxial cables and twisted pair cables transmit electrical signals, and optical fibers transmit optical signals. The three types of wired transmission commonly used in computing Shenru machine networks are twisted pair, coaxial cable, and optical imitation fiber.

Yes, dear.

Answer]: B database technology research and source resolution implicitly solve the problem of effective organization and storage of a large amount of data in the process of computer information processing, reduce data storage redundancy, realize data sharing, ensure data security, and efficiently retrieve and process data in the database system. The fundamental goal of database technology is to solve the problem of data sharing.