ents for …re going to want to reduce the documents for the next stage in the Pipeline, into smaller objects — returning only the fields we want, or aliasing their names. The documents returned to the next stage of the pipeline will only contain the values specified by…
o return one combined result. It processes documents and return computed results and can perform a variety of operati… Aggregation in MongoDB is an operation used to process the data that returns the computed results. Aggregation basically groups the data from multiple documents and operates in many ways on those grouped data in order to return one combined result. It processes documents and return computed results and can perform a variety of operations on the …