Merge Similar Collections with $unionWith
Understand how to merge similar MongoDB collections using the $unionWith aggregation operator to create combined datasets. Learn to aggregate data from multiple collections and perform calculations such as total revenue, enabling unified reporting and analysis across distributed data.
We'll cover the following...
We'll cover the following...
The $unionWith operator in MongoDB is a powerful feature that allows us to combine the results of multiple collections into a single aggregation pipeline. This is especially useful when we have multiple collections with similar schemas and want to analyze or report on them as if they were a single dataset.
Setting up
Up until ...