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![nayanchellani Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1860391268972470272.png) Nayan Chellani [@nayanchellani](/creator/twitter/nayanchellani) on x XX followers
Created: 2025-07-25 16:36:34 UTC

MongoDB- Day XX
Practiced $project, $unwind, and $ifNull in aggregation!
-Top X products by sales
-User count by status
- Filtered arrays with $unwind + $match
Now diving into Schema Design!
-Embed vs Reference: when to use what?
#MongoDB #100DaysOfCode #BackendDev #LearnInPublic


XX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1948784453301530848/c:line.svg)

**Related Topics**
[embed](/topic/embed)
[$match](/topic/$match)
[$ifnull](/topic/$ifnull)
[$unwind](/topic/$unwind)
[$project](/topic/$project)

[Post Link](https://x.com/nayanchellani/status/1948784453301530848)