A database, in a nutshell, is itself an electronic filing cabinet -- a place where electronic files are stored. Users can add, intercept, update and delete data in files.

A database is a collection of data stored together in a manner that can be Shared by multiple users with as little redundancy as possible and separate from the application.

The advantage of it is:

(1) data sharing can be realized.

(2) reduce data redundancy.

(3) data independence.

(4) centralized control of data.

(5) data consistency and maintainability to ensure data security and reliability.