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

Create a table student with attributes student name, Question 1 Create a t...

Question 1 Create a table student with attributes student name, roll number, total marks and percentage. Do the following operations Insert details in to the table Update

Describe the major steps in the implementation process, Question: (a) ...

Question: (a) One of the steps in the five-step problem-solving model is implementation. Implementation is considered a key step in the problem-solving model. A problem may be

Describe five main functions of a database administrator, Describe five mai...

Describe five main functions of a database administrator. Ans: A database administrator (DBA) is a person who is accountable for the environmental aspects of a database. Genera

How can you start mysql server, How can you Start MySQL Server? To star...

How can you Start MySQL Server? To start the mysql program type it is name in the command- line prompt. After starting mysql program just display A welcome letter using the

Explain query tree represent relational algebra expression, How does a quer...

How does a query tree represent a relational algebra expression?      Ans: This includes transforming an initial expression (tree) into an equivalent expression (tree) that is

Oracle fusion middleware, Oracle Fusion Middleware: Key Skills: Consul...

Oracle Fusion Middleware: Key Skills: Consulting,Architect, Oracle Fusion Middleware,ECM, UCM, Stellent,Identity Management, SOA Suites, BPEL, ESB,OAM,OIM,J2ee, Java, Livelink

Although how will the system recover, Although how will the system recover ...

Although how will the system recover The selection of REDO or UNDO for a transaction for the recovery is completed on the basis of the state of the transactions. This state is

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