Summary

In this chapter, we have covered all the essential components that you need to understand, write, comprehend, and improve MongoDB aggregations. This new functionality will help you to answer more complex and difficult questions about your data. By creating multi-stage pipelines that join multiple collections, you can increase the scope of your queries to the entire database instead of a single collection. We also looked at how to write the results into a new collection to enable further exploration or manipulation of the data.

In the final section, we covered the importance of ensuring that your pipelines are written with scalability, readability, and performance in mind. By focusing on these aspects, your pipelines will continue to deliver value in the future and can act as a basis for further aggregations.

However, what we have covered here is just the beginning of what you can accomplish with the aggregation feature. It is critical that you keep exploring, experimenting...