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Which of the following provides similar functionality to join?

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+1 vote
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in MongoDB by (131k points)
Which of the following provides similar functionality to join?

(a) $unwindelem

(b) $unwind

(c) $unwin

(d) None of the mentioned

The question was posed to me by my school teacher while I was bunking the class.

The doubt is from SQL to Aggregation Mapping Chart in chapter Aggregation Concepts and Aggregation Mechanics of MongoDB

1 Answer

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Best answer
Correct option is (c) $unwin

To explain: $unwind operator allows for somewhat similar functionality like join, but with fields embedded within the document.

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