Database System Overview

First, the basic concepts and terminology of the database

I. Data

The base object to store. A record describing a thing's symbol is called data.

II. databases (database)

A collection of data stored in a computer that is used to store data. There's an organization!

Third, the database management system (databases management The system DBMS)

Manage data and manage databases.

Iv. Database Systems (DB system DBS)

Database, database management system, application system, database administrator. Abbreviation database.

Then, the development of data management technology

Three stages:

Manual Management

File system

Database

The database has advantages over the other two phases:

1. Data structure: The structural integration of the whole.

2. Data sharing is high, redundancy is low, easy to expand.

3. High data Independence: Level two mapping

4. Data has DBMS unified management

Database System Overview