From the course: MongoDB Python Developer Associate Cert Prep
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MongoDB aggregation with Python review
From the course: MongoDB Python Developer Associate Cert Prep
MongoDB aggregation with Python review
- In this unit, you learned about the aggregation framework and how to build aggregation pipelines that use the match, group, sort, and project stages. Aggregation is a powerful language for filtering, sorting, grouping, and projecting data without changing the data in your actual collection. Aggregation allows us to string together aggregation operations known as stages to create an aggregation pipeline. This allows us to dictate exactly how we want to process our data step by step. This unit started with an overview of aggregation and the stages of an aggregation pipeline, which include finding, sorting, grouping, and projecting. These stages can use expression operators. Then we created our first pipeline by matching documents and then grouping them based on specific criteria. In our second pipeline, we sorted our results in descending order by using the sort stage. Finally, we used the project stage to return specific…
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