When using RIGHT JOIN, the number of rows in the result can be greater than the number of rows in the right table if: - Never - The left table is empty - Both tables have the same number of rows - The left table contains duplicate keys matching the rows of the right table

When using RIGHT JOIN, the number of rows in the result can be greater than the number of rows in the right table if the left table contains duplicate keys corresponding to the rows in the right table.

Explanation: RIGHT JOIN returns all rows from the right table and the matching rows from the left. If there are multiple matches (duplicates) in the left table for a key from the right table, then there will be multiple rows in the result for one row of the right table, increasing the total number of rows compared to the right table.