Скачать или смотреть Master MongoDB Aggregation Pipeline: $match, $unwind, $group, $project

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Learn the fundamentals of MongoDB's aggregation framework in this practical guide! We'll walk you through a common aggregation pipeline sequence using the $match, $unwind, $group, and $project stages to query, process, and transform your data. Discover how to filter documents, deconstruct arrays, group data by specific values, and clean up your output for clear, actionable insights. In this video, we'll demonstrate how to generate a report showing the total revenue generated from book sales for each genre in 2024 using a sales collection. Master these essential stages to unlock the power of data aggregation in MongoDB!

0:00:00 - Introduction to MongoDB Aggregation Framework
0:00:14 - Common Aggregation Pipeline Stages: $Match, $Group, $Project
0:00:34 - Dataset Introduction: Online Bookstore Sales
0:01:01 - Example Sales Document
0:01:29 - The $Unwind Stage
0:02:02 - $Match Stage for Filtering by Date
0:02:56 - Unwinding the Books Array
0:03:11 - $Group Stage for Calculating Revenue by Genre
0:04:01 - $Project Stage for Output Formatting
0:04:53 - Recap of Aggregation Stages

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