Which of the following SQL keywords is used to perform a Cartesian product in SQL?JOINCROSS JOINUNIONINNER JOIN

To perform a Cartesian product in SQL, the correct keyword to use is CROSS JOIN.

Explanation:

1. CROSS JOIN: This keyword explicitly creates a Cartesian product between two tables, meaning every row from the first table is combined with every row from the second table.

2. JOIN: This is a general term that could refer to various types of joins, but it does not specify a Cartesian product.

3. INNER JOIN: This keyword is used to return rows when there is a match in both tables, which is not the same as a Cartesian product.

4. UNION: This keyword is used to combine the results of two or more SELECT queries, again not relevant to Cartesian products.

Conclusion:

Thus, the correct answer is CROSS JOIN.