What is data independence, Database Management System

What is data independence?

Data Independence: Techniques which permit data to be changed without affecting the applications in which procedure it. There are two types of data independence. The first type is data independence for data that is accomplished in a database management system (DBMS). It permits the database to be structurally changed without affecting most existing programs. Programs access data in a DBMS through field and are concerned with just the data fields they use, not the format of the finished record. Therefore, when the record layout is updated (fields added, deleted or changed in size), the only programs which must be changed are those in which use those new fields.

Posted Date: 5/13/2013 2:27:14 AM | Location : United States

Related Discussions:- What is data independence, Assignment Help, Ask Question on What is data independence, Get Answer, Expert's Help, What is data independence Discussions

Write discussion on What is data independence
Your posts are moderated
Related Questions
1. Will you advise that your organization uses open source software and why? 2. Why is it important for business managers to have a basic understanding of the software development

Economics: It is now usually accepted that it costs less to make a system of smaller computers with the equivalent power of a one large computer. It is more cost-effective to get s

What is a database? Database - Basically in simple terms A database is a collection of inter related data and/or information stored so which it is available to several users

Project Description: Critical Project for VMware Technical support. VMWare ESXi 5.1 support for upgradation and migration problem. Technical expert of Vmware needed. Sk

1.  Based on the dependency diagram, create a database whose tables are in at least 2NF, showing the dependency diagram for each table (as shown in class).  Label the types of depe

One-way Associations When an association is traversed only in the one direction, then it is implemented as a pointer i.e.an attribute which contains an object reference. If mu

What are the Objectives of object design After going through this unit, you could be able to: explain steps of object design; discuss algorithms that reduce costs;

Given the subsequent relations:    vehicle (reg_no, make, colour)    Person (eno, name, address)    Owner (eno, reg_no)   Write expressions

State as Location within a Program In this traditional approach, location of control inside a program totally defines the program state. Any finite state machine may be implem