Aggregation basics in MongoDB with examples – Part 2

Aggregation basics in MongoDB with examples – Part 2 Banner

In this post, I will discuss $lookup, $unwind, $project and $addFields stages in MongoDB Aggregation pipeline with examples You can read about MongoDB Aggregation and Pipeline Basics in Part 1 $lookup $lookup is used for joining the data from multiple collections. You can think of it as an outer join in SQL. $lookup is little … Read more Aggregation basics in MongoDB with examples – Part 2