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Microsoft Exam DP-600 Topic 1 Question 9 Discussion

Actual exam question for Microsoft's DP-600 exam
Question #: 9
Topic #: 1
[All DP-600 Questions]

You have a Fabric tenant that contains a lakehouse. You plan to use a visual query to merge two tables.

You need to ensure that the query returns all the rows that are present in both tables. Which type of join should you use?

Show Suggested Answer Hide Answer
Suggested Answer: C

When you need to return all rows that are present in both tables, you use a full outer join. This type of join combines the results of both left and right outer joins and returns all rows from both tables, with matching rows from both sides where available. If there is no match, the result is NULL on the side of the join where there is no match.


by Quentin at Apr 09, 2024, 12:46 PM

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Corinne
9 months ago
I think left outer join could also work if we want to keep all the rows from the table on the left side of the join.
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Mammie
9 months ago
That's true, but in this case, we want all rows from both tables, so a full outer join is more appropriate.
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Stanford
9 months ago
But what about using an inner join instead? It only returns rows that have matching values in both tables.
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Leonie
10 months ago
I agree with A full outer join will return all rows present in both tables.
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Mammie
10 months ago
I think we should use a full outer join.
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Julieta
10 months ago
A full outer join returns all rows from both tables, even if there is no match.
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Ollie
10 months ago
Why do you think that?
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Julieta
10 months ago
I disagree. I believe the answer is C) full outer.
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Ronny
10 months ago
Because an inner join returns rows when there is a match in both tables.
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Maile
11 months ago
Why do you think so?
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Ronny
11 months ago
I think the answer is F) inner.
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Truman
1 years ago
Hold on, what about a left outer join? That would also return all rows from the first table, plus any matching rows from the second table. Option A could work too, right?
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Dulce
1 years ago
Haha, you guys are really overthinking this. Why not just use an inner join? It will only return the rows that are present in both tables, which is what the question is asking for.
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Dudley
11 months ago
User 2
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Jamika
11 months ago
User 1
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Karima
11 months ago
You are right! Let's go with option F) inner.
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Emmett
11 months ago
F) inner
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Leota
12 months ago
E) right outer
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Sanda
12 months ago
D) left anti
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Serina
12 months ago
C) full outer
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Brice
12 months ago
B) right anti
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Kristofer
12 months ago
A) left outer
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Lynelle
1 years ago
Tell me about it! It's like they're trying to trick us or something. But hey, at least we've got each other to bounce ideas off of. That's better than staring at the screen alone, right?
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Brent
1 years ago
Absolutely! Teamwork makes the dreamwork, as they say. Although, I do have to admit, I'm a little nervous about the next question. Who knows what kind of curveball they'll throw at us next!
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Jaime
1 years ago
Hmm, I'm not sure I agree. If we want to return all the rows from both tables, shouldn't we use a right outer join instead? That way, we'll get all the rows from the right table and the matching rows from the left table.
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Felix
1 years ago
Good point, Clarinda. A left outer join will return all the rows from the left table and the matching rows from the right table. This could be useful if we want to prioritize one table over the other.
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Peggie
1 years ago
Hmm, this seems like a straightforward question about join types. I'm pretty confident I know the answer, but let's see what the others think.
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Clarinda
1 years ago
But wait, what if we want to include all the rows from one table and only the matching rows from the other table? In that case, a left outer join might be more appropriate.
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Derick
1 years ago
I agree with Adolph. The full outer join will return all the rows from both tables, regardless of whether there is a match or not. This ensures that we don't miss any data.
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Adolph
1 years ago
This is a tricky question. We need to make sure we understand the requirements properly. The question states that we need to return all the rows that are present in both tables, so a full outer join seems like the best option.
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