Define data independence, Database Management System

Assignment Help:

Data independence seems that "the application is independent of the access strategy and storage structure of data". In other words, the ability to change the schema definition in one level could not change the schema definition in the next higher level. Two kinds of Data Independence:

Physical Data Independence: Change in physical level could not affect the logical level.
Logical Data Independence: Change in logical level could affect the view level.

1540_Data Independence.png

Related Discussions:- Define data independence

Degree relationship, what is binary relationship

what is binary relationship

What is the meaning of data independence, What is the meaning of Data indep...

What is the meaning of Data independence? Data independence means a programs that are not dependent on the physical attributes of data and a programs that are not dependent on

Hashing techniques, folding method and mid square method using visual basic...

folding method and mid square method using visual basic

A weak entity set and its identifying relationship, Q. Define a weak entit...

Q. Define a weak entity set and its identifying relationship. List the necessary conditions for a meaningful identifying relationship set of a weak entity set. Entity is a t

What are the causes of bucket overflow in a hash file, What are the causes ...

What are the causes of bucket overflow in a hash file organization? What can be done to reduce the occurrence of bucket overflow? When a record is inserted, the bucket to that

Textbook ordering system, Question: Consider the following database rel...

Question: Consider the following database relations for a textbook ordering system used by a college bookshop: Book (b-copy#, bname, ISBN#, author, price, subject) Order (s#

Finkelstein methodology, PART MARKING: For this section, we will use part m...

PART MARKING: For this section, we will use part marking. This means we will supply model answers to all questions but we will only mark six questions. We will choose these randoml

Decomposition, properties of derirable decomposition

properties of derirable decomposition

What are deadlocks, What are deadlocks? How can they be avoided? Ans:...

What are deadlocks? How can they be avoided? Ans: Deadlock considers to a particular condition when two or more processes are every waiting for another to release a resource,

What is e-r model, What is E-R model? This data model is based on real ...

What is E-R model? This data model is based on real world that having of basic objects called entities and of relationship between these objects. Entities are explained in a da

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages