____ operation preserves those tuples that would be lost in _____.
2018
____ operation preserves those tuples that would be lost in _____.
Answer: B. outer join, natural join — An outer join operation preserves those tuples that would be lost in a natural join. A full outer join returns all matching as well as non-matching rows from…
- A.
natural join, outer join
- B.
outer join, natural join
- C.
left outer join, right outer join
- D.
left outer join, natural join
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Correct answer: B
An outer join operation preserves those tuples that would be lost in a natural join. A full outer join returns all matching as well as non-matching rows from both the left and right tables.
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