Computer scienceSoftware development foundationsSQL and databasesDBMSMongoDBOperations and operators

Aggregate operations

$facet stage

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What is the purpose of the $facet stage in the aggregation pipeline?

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To sort the output of the pipeline based on a specified field or fields

To project only the fields we want in the output and renames "_id" to a different name

To deconstruct an array field from the input documents and outputs a separate document for each element in the array

To compute multiple aggregations on the same set of documents

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