$out Stage (aggregation)
The $out stage is a crucial component of the Aggregation Pipeline, it takes the documents returned by the aggregation pipeline and writes them to a specified collection. The returned documents can be written into a new collection by specifying the desired name of the new collection in the $out stage
$out stage must be the last stage in the aggregation pipeline. This stage is beneficial when we want to persist the aggregated data for further analysis, and reporting or to serve as a basis for subsequent queries.
MongoDB Aggregation $out
MongoDB’s Aggregation Pipeline is a powerful tool for data processing that allows users to perform a series of operations to filter, transform, and analyze data. One key stage in the aggregation pipeline is the $out stage, which enables users to write the output of the pipeline to a new collection.
In this article, we’ll explore the $out stage in the MongoDB aggregation pipeline along with its syntax, use cases, and examples of how it can be used efficiently to manage and analyze data.