Free CompTIA DataX DY0-001 Actual Exam Questions - Question 5 Discussion

B/C? LEFT and RIGHT OUTER JOIN both include all rows from one table plus matching rows from the other, so they still pull more data than INNER JOIN but less than FULL OUTER JOIN. If the question is about the absolute most data, FULL OUTER JOIN (D) makes sense, but if you’re considering performance or relevance, one sided outer join might be enough. Since they didn’t specify table relationships or size, I’d say FULL OUTER JOIN is most thorough, but LEFT or RIGHT are decent middle grounds depending on which table’s data you prioritize.

B imo, LEFT OUTER JOIN keeps all from one table plus matches, often more than INNER JOIN.

It’s D because FULL OUTER JOIN returns all rows from both tables, unmatched ones included, so it maximizes data output compared to the other join types that exclude some rows.

If the goal is max data output, FULL OUTER JOIN (D) includes all rows from both tables, even unmatched ones. INNER JOIN (A) limits to matches only, so it definitely won’t produce the most data.

D imo, since FULL OUTER JOIN brings in every record from both tables, matching or not, it definitely generates the most data overall. The other joins either limit results to matches or one side only, so they won’t maximize the dataset size like FULL OUTER JOIN does.

D imo, because FULL OUTER JOIN includes all records from both tables, even when there’s no match. But does the question imply any specific type of data or just the sheer volume? Sometimes volume depends on how tables relate, not just join type.