Access to Efficient Data: A DBMS uses a variety of complicated techniques to store and retrieve data efficiently. For example, publisher know immediate result soon his book sold in a retailer.
Data Integrity & Security: DBMS can impose integrity constraints. For example, "before interesting salary information for an employee, the system can check that the department budget is not exceeded. Also, it can enforce access controls that govern what data is visible to different classes of users." (pg.9, Ramarkrishnan, Gehrke)
Data Administration: When many users use the data, the central administration data offer great enhancements.
Concurrent Access & Crash Recovery: Systems protects users from the effect of the failures.
Reduced Application Development Time: System supports important functions that one common to many applications accessing data in the DBMS.
Resources: Database Management Systems, 3rd Edition, by Ramakrishnan & Gehrke and Information Systems Today, 2nd Edition, by Jessup, Valacich & Wade.
figure from: http://www.made-in-china.com/image/6f3j00teFacTGqVEohM/Amr-Ami-Backend-Database-Management-System-Meter.jpg
more infor visit:http://www.wisegeek.com/what-is-a-database-management-system.htm
No comments:
Post a Comment