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$Unwind Aggregation Operator In Mongodb

In this article, we will discuss the $unwind aggregation operator in MongoDB.

Purpose

The $unwind aggregation operator is used to deconstruct an array field from an input document and outputs the document for each element in an array.

{ $unwind: "<field>" }

Consider the following collections: -

To unwind the array, write the following query: -

db.authors.aggregate([
  { $unwind: "$authors" }
])

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