What is stored in the database
What is stored in the database is data and the relationship between data. A database is a warehouse that organizes, stores, and manages data according to a data structure. It is a collection of large amounts of data that is stored in a computer for a long time, is organized, shareable, and unified management.
#The operating environment of this article: Windows 7 system, Dell G3 computer.
A database is a "warehouse that organizes, stores and manages data according to data structure". It is a collection of large amounts of data that is stored in a computer for a long time, is organized, shareable, and unified management.
A database is a computer software system that stores and manages data according to a data structure. The concept of database actually includes two meanings:
(1) Database is an entity, which is a "warehouse" that can reasonably store data. Users store transaction data to be managed in this "warehouse". "Data" " and "library" are combined into a database.
(2) Database is a new method and technology for data management. It can organize data more appropriately, maintain data more conveniently, control data more closely and utilize data more effectively.
Related expansion introduction:
The database is a warehouse that stores data. It has a large storage space and can store millions, tens of millions, or hundreds of millions of pieces of data. However, the database does not store data arbitrarily, there are certain rules, otherwise the query efficiency will be very low. Today's world is an Internet world full of data, filled with a lot of data. That is, this Internet world is the data world. There are many sources of data, such as travel records, consumption records, web pages browsed, messages sent, etc. In addition to text type data, images, music, and sounds are all data.
A database is a computer software system that stores and manages data according to a data structure. The concept of database actually includes two meanings:
(1) Database is an entity, which is a "warehouse" that can reasonably store data. Users store transaction data to be managed in this "warehouse". "Data" " and "library" are combined into a database.
(2) Database is a new method and technology for data management. It can organize data more appropriately, maintain data more conveniently, control data more closely and utilize data more effectively.
As the most important basic software, the database is the cornerstone to ensure the stable operation of the computer system.
Development status
In the history of database development, databases have experienced various stages of development, such as hierarchical databases, network databases, and relational databases. Database technology has developed rapidly in all aspects. In particular, relational databases have become the most important among current database products. Since the 1980s, almost all new database products released by database manufacturers support relational databases. Even some non-relational database products almost all support relational databases. Interface. This is mainly because traditional relational databases can better solve the problems of managing and storing relational data. With the development of cloud computing and the advent of the big data era, relational databases are increasingly unable to meet needs. This is mainly due to the fact that more and more semi-relational and non-relational data need to be stored and managed in databases. At the same time, The emergence of new technologies such as distributed technology has also put forward new requirements for database technology, so more and more non-relational databases have begun to appear. This type of database has different design and data structure from traditional relational databases. Big difference. They place more emphasis on high-concurrency reading and writing of database data and storage of big data. This type of database is generally called a NoSQL (Not only SQL) database. The traditional relational database still maintains strong vitality in some traditional fields.
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