Explain the cartesian product, Database Management System

Assignment Help:

Explain the Cartesian product: 

The Cartesian product operation does not need relations to union-compatible.  The meaning of this is that the involved relations may have dissimilar schemas.  Let R & S be relations that may have dissimilar schemas. 

 DEF: Cartesian product

 The Cartesian product of relations R and S, denoted R X S, is the set of all probable combinations of tuples of the two operation relations.  Every resultant tuple contains all the attributes of R and S. 

The resultant relation has  

 Cardinality = (cardinality of R) * (cardinality of S); and 

 arity = (arity of R)  +  (arity of S). 

 For instance, in given table, STUDENT X MODULE is equal to

1560_Cartesian Product.png


Related Discussions:- Explain the cartesian product

The natural join is equal to which product, The natural join is equal to wh...

The natural join is equal to which product? The natural join is equal to Combination of projection and Cartesian product

Heuristics, Benefits of using heuristics

Benefits of using heuristics

Views, what is view?explain

what is view?explain

Case-based online phone repair, please i request for your assistance in de...

please i request for your assistance in developing a case-based online phone repair

Entity integrity, Before defines the second type of integrity constraint, v...

Before defines the second type of integrity constraint, viz., Entity Integrity, we should be well-known with the concept of NULL. Mostly, NULL is intended as a basis for dealing

Define view? how it is related to data independence, A View may be defi...

A View may be defined of as a virtual table, that is, a table that does not really exist in its own right but is instead inferred from one or more underlying base data table. T

Commercial database architecture, At its most essential level the DBMS arch...

At its most essential level the DBMS architecture can be divide into two parts: the back end and the front end. The back end is responsible for managing the physical database an

Advantages to copying records from one table to another, What kind of advan...

What kind of advantages to copying records from one table to another? -) When an algorithm that modifies a table is used after that it's safer to work with the copy -) When

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd