Equijoin, Database Management System

When every condition appears with equality condition (=) only. c)  

Natural join (denoted by R*S)

When two join attributes have the similar name in both relations. (That attribute is

Known as Join attribute), only one of the two attributes is retained in the join relation. The join condition in such a case is = for the join attribute. The condition is not given in the natural join.

Posted Date: 3/6/2013 5:53:47 AM | Location : United States







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

Write discussion on Equijoin
Your posts are moderated
Related Questions
Distributed And Client Server Databases Introduction This unit tells the distributed database systems which are primarily relational and one important execution model: the

Question: In relation to distributed database answer the following questions: (i) Give a brief definition of distributed database. Support your answer with an appropriate di

Write short notes on tuple relational calculus. The tuple relational calculation is anon procedural query language. It defines the desired information without giving a particul

Single Valued Normalisation  Codd in the year 1972 formed three normal forms (1NF, 2NF, and 3NF). These were based on functional dependencies between the attributes of a relati

Primary Key The primary key is the candidate key that is selected by the database designer as the principal denotes of identifying entities within an entity set. The left candi

What is called as an N-way merge? The merge operation is a generalization of the two-way merge used by the standard in-memory sort-merge algorithm. It merges N runs, so it is k

Define the concept of Object Diagram An object diagram shows a set of the objects and their relationships with each other at a point of time. In a static view, object diagram

what is relationship inheritance and attribute inheritance

what should be included in this???

What are attributes? Give examples. An entity is shown by a set of attributes. Attributes are descriptive properties possessed by every member of an entity set. Example: pos