When using an OUTER JOIN, you must explicitly state what kind of OUTER JOIN you want - a LEFT JOIN, a RIGHT JOIN, or a FULL JOIN. (T/F)1 pointTrueFalse
Question
When using an OUTER JOIN, you must explicitly state what kind of OUTER JOIN you want - a LEFT JOIN, a RIGHT JOIN, or a FULL JOIN. (T/F)
1 point
True
False
Solution
Answer
True
When performing an OUTER JOIN in SQL, it is indeed required to specify the type of OUTER JOIN you want to execute. The types of OUTER JOINs include:
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LEFT JOIN: This retrieves all records from the left table and the matched records from the right table. If there is no match, NULL values are returned for columns from the right table.
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RIGHT JOIN: This retrieves all records from the right table and the matched records from the left table. If there is no match, NULL values are returned for columns from the left table.
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FULL JOIN: This retrieves all records when there is a match in either left or right table records. It returns NULL values for the columns where there are no matches.
The explicit specification of the type of OUTER JOIN is essential to determine how the SQL query will return the data from the tables involved.
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