What is stored in a database?

A database is "a repository for organizing, storing, and managing data according to a data structure". It is a collection of large amounts of data that are stored in a computer over time, organized, ****able, and uniformly managed.

A database is a computer software system that stores and manages data according to its structure. The concept of database actually includes two meanings: database is an entity, it is able to reasonably keep data "warehouse", the user in the "warehouse" in the storage of transaction data to be managed, "data" and "library". "Data" and "library" two concepts combine to become a database.

Database system, is a system composed of a database and its management software. Database system is to adapt to the needs of data processing and the development of a more ideal data processing system, but also for the actual operation of the storage, maintenance and application system to provide data software system, is the storage medium, processing objects and management system of the aggregate.