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Aggregation Examples

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This document provides the practical examples that display the capabilities of aggregation.

Aggregation with the Zip Code Data Set
Use the aggregation pipeline to group values and to calculate aggregated sums and averages for a collection of United States zip codes.
Aggregation with User Preference Data
Use the pipeline to sort, normalize, and sum data on a collection of user data.
Map-Reduce Examples
Define map-reduce operations that select ranges, group data, and calculate sums and averages.
Perform Incremental Map-Reduce
Run a map-reduce operations over one collection and output results to another collection.
Troubleshoot the Map Function
Steps to troubleshoot the map function.
Troubleshoot the Reduce Function
Steps to troubleshoot the reduce function.