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What is Database Technology:
Database technology is a core technology of information systems. It is a computer-aided method of managing data, which studies how to organize and store data, and how to obtain and process data efficiently. It is a technology that studies the basic theories and implementation methods of database structure, storage, design, management, and application, and uses these theories to process, analyze, and understand the data in the database.
That is, database technology is a software science that researches, manages, and applies databases. Database technology is an important part of modern information science and technology, and is the core of computer data processing and information management system.
Database technology studies and solves the problem of effective organization and storage of a large amount of data in the process of computer information processing, reduces data storage redundancy, realizes data sharing, ensures data security, and efficiently retrieves and processes data in the database system. The object of database technology research and management is data, so the specific content involved in database technology mainly includes: through the unified organization and management of data, the corresponding database and data warehouse are established according to the specified structure; The database management system and data mining system are used to design a data management and data mining application system that can realize various functions such as adding, modifying, deleting, processing, analyzing, understanding, reporting and printing the data in the database. And use the application management system to finally realize the processing, analysis and understanding of data.
Database technology involves many basic concepts: including: information, data, data processing, databases, database management systems, and database systems.
Database technology is an important part of modern information science and technology, and is the core of computer data processing and information management system. Database technology studies and solves the problem of effective organization and storage of a large amount of data in the process of computer information processing, reduces data storage redundancy, realizes data sharing, ensures data security, and efficiently retrieves and processes data in the database system.
Learning should be based on theory, operation, application, and deepening development.
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Why study databases? Because he's important, a system without a database is a dead system.
Of course, if you just ask for a static web database, it's useless.
But now the concept advocated by the Internet is that everyone has to communicate, so what about the information that is exchanged? Use a database to store shellfish.
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The characteristics are as follows: 1. Data is structured, and there is a connection between data, which is oriented to the whole system.
2. High data sharing, low redundancy, and easy expansion. The database system describes the data from a holistic perspective, and the data is no longer oriented to a certain application but to the entire system, so the data can be used by multiple users and multiple applications.
3. High data independence. Data independence is a common term in the database world, including the physical independence of data and the logical independence of data. Physical independence means that the user's application is independent of the data stored in the database on disk.
4. The data is managed and controlled by DBMS. Database sharing is concurrent sharing, that is, multiple users can access data in the database at the same time, or even the same data in the database at the same time.
The deletion operation in the data is irreparable, sometimes the data in the data table may be deleted due to misoperation, or the database crashes for other reasons, and all the data is lost, especially when there is a large amount of useful data in the database, then it is impossible for you to enter the data again from the beginning, this is the role of the backup database, back up the database, when the above situation occurs, you can restore the previous database through the backup file.
Key features: 1) Realize data sharing.
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Correct Answer: a
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