Final answer:
The statement that a LEFT JOIN can be re-stated as a RIGHT JOIN is False. (option B)
Step-by-step explanation:
A LEFT JOIN and a RIGHT JOIN are both types of OUTER JOINS in relational database queries, but they are not interchangeable. A LEFT JOIN includes all rows from the left table along with matching rows from the right table, and if there are no matches in the right table, NULL values are returned for the columns from the right table. Conversely, a RIGHT JOIN includes all rows from the right table along with matching rows from the left table, and if there are no matches in the left table, NULL values are returned for the columns from the left table.
To restate a LEFT JOIN as a RIGHT JOIN, or vice versa, the positions of the tables need to be swapped while keeping the JOIN conditions and the SELECT clause intact. However, this transformation does not result in equivalent outcomes, as the inclusion of unmatched rows is now based on the table that was originally on the right. It's crucial to recognize that the choice between LEFT JOIN and RIGHT JOIN depends on the specific requirements of the query and the desired inclusion of unmatched rows from a particular direction. In summary, a LEFT JOIN and a RIGHT JOIN serve distinct purposes, and their results differ based on the order of the tables in the join.