Data redundancy, Database Management System

Data Redundancy-A lot of information is being repeated in the relation. For instance, the information that MCS-014 is named SSAD is repetitive, address of Rahul is "D- 27, Main road, Ranchi" is being repetitive in the first 3 records. Please search the other duplicate information. So we search that the course name, student name,  address, instructor name and office number are being repeated often, thus, the table has Data Redundancy.

Please also note that each time we wish to insert a student record for a subject taken by him/her, say for instance, MCS-013, we have to insert the name of the course as well as the name and office number of its instructor. Also, every time we insert a new course we have to repeat the name and address of the student who has taken it. This replication of information results in troubles in addition to the wastage of space. Notice these problems in the STUDENT relation. What are these problems? Let us explain them.


Posted Date: 3/7/2013 1:41:49 AM | Location : United States

Related Discussions:- Data redundancy, Assignment Help, Ask Question on Data redundancy, Get Answer, Expert's Help, Data redundancy Discussions

Write discussion on Data redundancy
Your posts are moderated
Related Questions
What it creates while a primary key is combined with a foreign key? It creates Parent-Child relation ship between the tables that connect them while a primary key is combined w

What is object containment? References among objects can be used to model dissimilar real-world concepts.

Which is an advantage of view? The Advantages of view is Data security, Derived columns and Hiding of complex queries

What is Secondary Index While making the index, generally the index table is kept in the primary memory (RAM) and the main table, because of its size is keeps in the secondary

a set of possible data value of an attribute is called??

Differentiate strict two phase locking protocol and rigorous two phase locking protocol. In strict two phase locking protocol all exclusive mode locks taken by a transaction is

In Oracle what is system global area and how is it organized? The SGA is a collection of shared memory fields which along with the Oracle processes constitute an Oracle instan

The Second Normal Form (2NF) Definition: A relation is in 2NF if it is in 1NF and each non-key attribute is fully dependent on each candidate key of the relation. Some of th