8/28/2023 0 Comments Group mongodb compassSee the MongoDB documentation for more information. The stages in a pipeline can filter, sort, group, reshape and modify documents that pass through the pipeline. The stages make up what is known as a pipeline. Therefore, $sortB圜ount simply counts the numbers from the document provided to it, which included just one dog. Aggregation is a way of processing a large number of documents in a collection by means of passing them through different stages. This time only one dog is in the document passed to $sortB圜ount, because the first pipeline stage removed dogs over a certain weight. Here’s another example, but with added filtering criteria. Suppose we have a collection called pets with the following documents: The documents are sorted by count in descending order.
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