Question

Cartesian product (use operator CROSS JOIN)

Option 1: INNER JOIN
Option 2: LEFT OUTER JOIN
Option 3: CROSS JOIN
Option 4: SELF JOIN

Answer 1

The Cartesian product is a mathematical operation that combines two sets and returns a set of ordered pairs. There are four options to perform the Cartesian product: INNER JOIN, LEFT OUTER JOIN, CROSS JOIN, and SELF JOIN.

Step-by-step explanation:

The Cartesian product is a mathematical operation that combines two sets and returns a set of ordered pairs. The CROSS JOIN operator is used to find the Cartesian product in SQL. There are four options to perform the Cartesian product:

1. INNER JOIN: Returns only the matching pairs of the two sets.
2. LEFT OUTER JOIN: Returns all pairs of the left set along with matching pairs from the right set.
3. CROSS JOIN: Returns all possible pairs of the two sets.
4. SELF JOIN: Joins a set with itself.

For example, if we have sets A={1, 2} and B={x, y}, the Cartesian product using the CROSS JOIN operator would be {(1, x), (1, y), (2, x), (2, y)}.