How many types of data independence have, Database Management System

Types of data independence

Data independence can be classified into the following two types:

Physical Data Independence: This means that for any change made in the physical schema, the requirement to change the logical schema is minimal. This is practically simpler to achieve.

Logical Data Independence: This means that for any change made in the logical schema, the requirement to change the external schema is minimal. As we shall see, this is a little complex to achieve.

 

Posted Date: 7/26/2013 5:33:59 AM | Location : United States







Related Discussions:- How many types of data independence have, Assignment Help, Ask Question on How many types of data independence have, Get Answer, Expert's Help, How many types of data independence have Discussions

Write discussion on How many types of data independence have
Your posts are moderated
Related Questions
is Chipo carrying his baby

What is Management System? A management system is a set of rules and process which help us to create organize and manipulate the database. It also helps us to add, change delet

Improved performance: As the data is located near the site of its demand, and given the inherent parallelism because of multiple copies, speed of database access may be good for di

atient(PNumber, Name, NHS_no, Amount_due, DNO, Doctor, Medical_Treatment), relation of schema Staff(StaffNum, Name, DNO, Task) and relation of schema Dept(DNO, Name, Location, Dire

I am using Siteground. And my database is full of limit so need someone who reduces the data which no need. This is very simple and simple task. Skills required are Databa



List the SQL domain Types? SQL supports the following domain types. 1) Char(n) 2) varchar(n) 3) int 4) numeric(p,d) 5) float(n) 6) date.

Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.

How can i turn a conceptual entity relationship diagram into a logical entity relationship diagram? what do i have to do with "mandetory or" and "optional or" relationships?