Here we learn about What is Database and Characteristics of data in Database. A database is an organized collection of data and contains information relevant to an enterprise.
The database is also called the repository or container for a collection of data files.
For example, the university database for maintaining information about students, courses, and grades in university.
What is Database?
A database is a collection of related data.
A database is a collection of information that is organized so that it can be easily accessed, managed, and updated.
Characteristics of Data in a Database:
The data in a database should have the following features:
Data should be sharable among different users and applications.
Data should exist permanently in the database. Changes in the database must not be lost because of any failure.
It should maintain integrity so that there is always correct data in the database.
Data should be protected from unauthorized access.
Data should not be repeated.
A consistent state of the database satisfies all the constraints specified in the database.
Data in a database is consistent if any changes in the database take the database from one consistent state to another.
The three levels in the schema should be independent of each other so that the changes in the schema at one level should not affect the other levels.