Afterword

And now you know everything there is to know about aggregations—at least, the essential knowledge.

I hope this book has been as helpful to you as it has been to all of us at MongoDB. I joined MongoDB in 2013, and one of the areas where I experienced the most difficulty was aggregations. The resource I turned to most frequently was Asya (Principal Engineer, MongoDB, Inc.), or Paul Done himself, and his numerous writings on the subject.

Here at MongoDB, we regularly use the aggregation framework to answer some of the most complex questions about our products. Aggregations provide analytical capabilities that are performant and scalable inside of MongoDB Atlas for millions of users. Knowing how to use the aggregation functionality provides our teams—product, analytics, data science, operations, and other business functions—with fast insights to power our decision making and priorities.

I would like to thank Paul Done, our author, for writing this...