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MongoDB aggregation review
- Congratulations on completing this unit. You now know how to use aggregation in MongoDB. Aggregation is a way to filter, sort, group, reshape, and analyze data without changing any data in your collection. You can use aggregation to answer questions and gain insights from the data in your collections. We covered a lot in this unit, starting with how to create an aggregation pipeline and the components of a stage. We also covered different stages, including $match, $group, $sort, $limit, $project, $set, $count, and $out. We created aggregation pipelines while keeping in mind that the order of stages specifies the order of operations that the data will go through. You might already have a lot of ideas about how you can use an aggregation pipeline to quickly and easily find answers hidden in your dataset. Give it a try. If you get stuck, MongoDB offers extensive documentation for all of these aggregation stages and…
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Introduction to MongoDB aggregation3 分钟 18 秒
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Using $match and $group stages in a MongoDB aggregation pipeline2 分钟 41 秒
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Using $sort and $limit stages in a MongoDB aggregation pipeline2 分钟 48 秒
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Using $project, $count, and $set stages in a MongoDB aggregation pipeline4 分钟 2 秒
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Using $out stage in a MongoDB aggregation pipeline2 分钟 47 秒
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MongoDB aggregation review1 分钟
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