Question

IIn MYSQL database, if a table, Alpha has degree 5 and cardinality 3, and

another table, Beta has degree 3 and cardinality 5, what will be the
degree and cardinality of the Cartesian product of Alpha and Beta?
a. 5,3
b. 8,15
c. 3,5
d. 15,8

Answer 1

The degree and cardinality of the Cartesian product of Alpha and Beta is 8, 15 (option b).

Step-by-step explanation:

The degree of a table refers to the number of attributes or columns in the table. The cardinality of a table refers to the number of tuples or rows in the table.

In this case, the table Alpha has a degree of 5, meaning it has 5 columns. The cardinality of Alpha is 3, indicating that it has 3 rows.

The table Beta has a degree of 3, meaning it has 3 columns. The cardinality of Beta is 5, indicating that it has 5 rows.

The Cartesian product of Alpha and Beta is formed by combining every row of Alpha with every row of Beta.

The resulting table will have a degree equal to the sum of the degrees of Alpha and Beta, which is 5 + 3 = 8.

The cardinality of the Cartesian product will be the product of the cardinalities of Alpha and Beta, which is 3 * 5 = 15.

Therefore, the degree and cardinality of the Cartesian product of Alpha and Beta is 8, 15.