Mongodb Aggregate Example Tutorial is today’s leading topic. When it’s time to gather the metrics from MongoDB , there is no better solution than MongoDB  aggregations . Aggregations are the set of functions that allow you to manipulate the data being returned from a MongoDB query. Aggregations  operations can process the data records and return the computed results. Aggregation  operations group values from multiple documents together and can perform a variety of activities on the grouped data to return the single result. Aggregation bundles the data from multiple records and operates in many ways on those pooled data to return one combined result.

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