Aggregation Framework with Node.js Tutorial

The aggregation framework is a powerful tool for analyzing data stored in MongoDB. It allows users to create an aggregation pipeline that consists of one or more stages, each transforming the documents and passing the output to the next stage. The framework has various stages available, including $match, $group, $sort, and $limit. In this tutorial, we used the Aggregation Pipeline Builder in Atlas to create a pipeline for finding the cheapest suburbs in Sydney, Australia. We then executed the pipeline from inside a Node.js script using the aggregate() method of the MongoClient class. The script printed the ten cheapest suburbs with their average prices.