Relationships, Database Management System

Let us first describe the term relationships.

What Are Relationships?

A relationship can be defined as:

  • A set of associations or connection, or
  • A rule for communication between entities:

 

Example:  In college the database, the association among student and course entity, i.e., "Student opts course" is an instance of a relationship.

Posted Date: 3/6/2013 6:04:21 AM | Location : United States







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

Write discussion on Relationships
Your posts are moderated
Related Questions
What is meant by normalization of data? It is a process of examining the given relation schemas based on their Functional Dependencies (FDs) and primary key to achieve the prop

waht is a repeating group?

What is database Trigger? A database trigger is a PL/SQL block that can explained to automatically execute for insert, update, and delete statements against a table. The trigge

A distributed database is defined as "a collection of multiple logically interrelated database which are physically distributed over a computer network" (a) Give any three advan

Illustrate the Deployment Diagram A deployment diagram shows all nodes on network, their processor execution and interconnections. In a dynamic model, this is used to represen

Dirty Reads: T10 reads a value which is updated by T9. This update has not been committed and T9 aborts. T9 T10 Value of x old value = 200

Explain the disadvantages of file oriented approach? In the oriented approach Applications are designed in isolation. Design of application is optimized for one application. In

Ask qu. Write a XML with database with book details (Book ID, Title, Author, subject, published year, language, vendor, and price).estion #Minimum 100 words accepted#

What is NULL? Simply NULL means not in value.

You are required to write a report which evaluates two of the following issues in relation to your case study database: a. Security issues b. Performance issues c. Backup