$group
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What is $group?
The $group aggregation stage groups documents by specified identifier expressions and applies accumulator operators like $sum, $avg, $max, $min, and $push. It's essential for data aggregation, calculating statistics, and creating summary reports. $group can group by single or multiple fields and supports complex expressions for dynamic grouping criteria.
Free resources to learn $group
- Official docsAggregation Operators
- Official docs$group
- ArticleMongoDB $group (aggregation) Usage with Examples
More in stage 9: Developer Tools
$group: common questions
Can I learn $group in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain $group in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this $group tutorial for beginners?
It is lesson 78 of 106 in the free MongoDB roadmap, in stage 9, Developer Tools. If you are new to MongoDB, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.