What is the attribute or combination of attributes that can uniquely identify a tuple in the database called?
- 王林Original
- 2020-07-08 09:58:3727584browse
The attribute or combination of attributes that can uniquely identify a tuple in the database is called a keyword. A database is a warehouse that stores data. It has a large storage space and can store a lot of data. But the database does not store data randomly, there are certain rules.
#The attribute or combination of attributes that can uniquely identify a tuple in the database is called a keyword.
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Related introduction:
Database
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.
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