What is MongoDB aggregation?

Can you explain what MongoDB aggregation is?

MongoDB aggregation is a framework for data processing and transformation, allowing you to perform operations on data sets.

What are some common aggregation operations I can use?

Common operations include $match, $group, $sort, and $project, which help filter, group, and reshape data.

Can you give me an example of using $group?

Sure! The $group stage can be used to group documents by a specific field and perform calculations, like summing values.

How does the aggregation pipeline work?

The aggregation pipeline processes data in stages, where each stage transforms the data and passes it to the next.