Joins · SQL SQL
What will be the behavior of a FULL OUTER JOIN between Table X and Table Y if there are rows in Table Y that do not match any rows in Table X?
Practice question from Joins (SQL SQL), with the correct answer and a step-by-step solution.
medium · MCQ · Q-A3C989
What will be the behavior of a FULL OUTER JOIN between Table X and Table Y if there are rows in Table Y that do not match any rows in Table X?
- A.Those rows from Table Y will be excluded from the final result set.
- B.Those rows from Table Y will be included, and columns from Table X for those rows will contain NULL values.Correct answer
- C.The query will throw a runtime error due to unmatched right-side data.
- D.Those rows from Table Y will be merged with the first row of Table X.
Solution
A FULL OUTER JOIN returns all records when there is a match in either left or right table records. If a row in the right table does not match the left table, the columns from the left table are filled with NULLs, and vice versa.
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