MongoDB Aggregation Example

Date: 2018-04-10

This tutorial demonstrates MongoDB aggregation, a process that combines multiple documents into a single result. It explains the aggregate() method, which groups documents to calculate sums, averages, etc. The tutorial uses examples to show how to create a database and collection, then uses aggregation with pipeline operators like $group and $sum to count employees by department. The examples illustrate querying documents based on criteria and grouping them for aggregate calculations.

Read more: https://examples.javacodegeeks.com/software-development/mongodb/mongodb-aggregation-example/