Question

Database design

what benefits of using a Cartesian product?

Answer 1

Cartesian product:- The Cartesian product also referred to as a cross-join, returns all the rows in all the tables listed in the query. Each row in the first table is paired with all the rows in the second table it is called as Cartesian product.

In database we widely use the Cartesian Product which gives us all the possible tuples that are paired together.

It is also useful when there is no relationship betweeen the two tables.

Benefits of using a Cartesian product:-

1.Cartesian product where we use and encounter huge relations with thousands of tuples having a large number of attributes in the database.

2.By using the Cartesian Product , you can answer a wide range of questions. e.g find the sales revenue in the marketing companies.

3.The Cartesian product also referred to as a cross-join.

4.Cartesian join is to generate a large amount of rows to use for testing.  

5.It combines the tuples of one relation with all the tuples of the other relation.
6. Example of Cartesian product.

R R CROSS S A 1 A B D F E 1 2 3 4 S 1 1 1 2 3 عرات انة اند 1 D E A 4 1 д д д A B B B B D D D D F F F F E E E E 4 4 4 4 5 S S 2 3 4 1 2 3 S A д C D 2 3 1 S 4 2 2 2 2 3 3 3 3 نطاليا D E A C D E 1 D E 4 2 3 4