What are the basic characteristics of a database
The basic characteristics of the database are: unstructured data, data independence, small data redundancy, easy expansion, unified management and control. The database uses a complex data model to represent the data structure; a database management system is used to uniformly manage and control the database to ensure the security and integrity of the database.
The operating environment of this tutorial: windows7 system, mysql8 version, Dell G3 computer.
A 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.
The basic characteristics of the database are: unstructured data, data independence, small data redundancy, easy expansion, unified management and control.
The database uses a complex data model to represent the data structure; it has high data sharing, low redundancy, and is easy to expand: it has high data independence; the database system provides users with a convenient user interface; The system provides data control functions in four aspects: database recovery, concurrency control, data integrity and data security.
In the database system, the "database management system" provides unified management and control of data.
Database Management System (Database Management System) is a large-scale software that manipulates and manages databases. It is used to establish, use and maintain databases, referred to as DBMS. It provides unified management and control of the database to ensure the security and integrity of the database.
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