To answer this question, you need to understand the concept of a LEFT JOIN in SQL.
A LEFT JOIN returns all rows from the left table, even if there are no matches in the right table.
Let's go through each option to understand why it is correct or incorrect:
Option A) left, right - This option is correct because a LEFT JOIN returns all rows from the left table, even if there are no matches in the right table.
Option B) right, left - This option is incorrect because a RIGHT JOIN returns all rows from the right table, even if there are no matches in the left table.
Option C) left, left - This option is incorrect because a LEFT JOIN returns all rows from the left table, even if there are no matches in the right table.
Option D) right, right - This option is incorrect because a RIGHT JOIN returns all rows from the right table, even if there are no matches in the left table.
The correct answer is Option A) left, right. This option is correct because a LEFT JOIN returns all rows from the left table, even if there are no matches in the right table.