You have been asked to construct a query in the company's RDBMS. You have deployed a Right Outer Join operation. Referring to the scenario above, what will happen to the final results when there is NO match between the tables?

technology databases

  1. The right table will return ALL rows

  2. The right table will return NULL

  3. Both tables will return NULL

  4. The left table will return ALL rows

  5. The left table will return NULL.

Show answer
Correct Option: D

AI Explanation

To answer this question, you need to understand the concept of a right outer join.

A right outer join returns all the rows from the right table (the table mentioned after the "RIGHT OUTER JOIN" keyword in the query) and the matching rows from the left table (the table mentioned before the "RIGHT OUTER JOIN" keyword). If there is no match between the tables, the left table will still return all its rows, but the columns from the right table will have NULL values.

So, in the scenario where there is NO match between the tables, the final result of a right outer join will be:

D. The left table will return ALL rows.

This is because the left table returns all its rows regardless of whether there is a match with the right table.

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