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Question 10Which of the following is true about FULL OUTER JOIN created on two tables Table 1 and Table 2?1 pointRetrieves only matched rows of Table 1 and Table 2Retrieves the unmatched rows of Table 2Retrieves both matched and unmatched rows of Table 1 and Table 2Retrieves all the unmatched rows of Table 1

Question

Question 10Which of the following is true about FULL OUTER JOIN created on two tables Table 1 and Table 2?1 pointRetrieves only matched rows of Table 1 and Table 2Retrieves the unmatched rows of Table 2Retrieves both matched and unmatched rows of Table 1 and Table 2Retrieves all the unmatched rows of Table 1

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Solution

The correct answer is: Retrieves both matched and unmatched rows of Table 1 and Table 2.

Here's why:

A FULL OUTER JOIN in SQL is a combination of LEFT and RIGHT JOIN. It returns all the rows from both tables, matching records from both sides where available. If there is no match, the result is NULL on either side.

So, it retrieves both matched (where a common value exists in both tables) and unmatched rows (where a common value does not exist) from Table 1 and Table 2.

The other options are partially correct but they do not fully describe the functionality of a FULL OUTER JOIN.

This problem has been solved

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What happens to unmatched rows with the full outer join operator?1 pointAll unmatched rows are removed from the result of a full outer join operation. Unmatched rows from both tables are retained in the result of a full outer join operation.Unmatched rows from only one table are retained in the result of a full outer join operation. Unmatched rows are randomly retained in the result of a full outer join operation.

Which JOIN returns only the matching rows from both tables?  1 pointINNER JOINLEFT JOINRIGHT JOINFULL OUTER JOIN

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