Skill Topic · Cinematic

📘 MongoDB — Advanced Aggregation

Aggregation ke advanced operators — window, facet, graphs aur zyada! 🔬

Topic 1

📌 1. $facet — Multiple Pipelines Ek Saath

📚 `javascript // ═══ Parallel pipelines on same data ═══ db.products.aggregate([ { $facet:…

Topic 2

💡 `javascript // ═══ $bucket — Manual ranges ═══ db.users.aggregate([ { $bucket: { groupBy:…

Topic 3

🎯 `javascript // ═══ Hierarchical data traverse karo ═══ // employees collection (org…

Topic 4

⭐ `javascript // ═══ Window functions! (SQL OVER/PARTITION BY jaisa) ═══ // Running total:…

Topic 5

🔑 String Operators `javascript db.users.aggregate([ { $project: { fullName: { $concat:…

Topic 6

✨ `javascript // ═══ Document ko kisi embedded field se replace karo ═══…

Topic 7

🌟 `javascript // ═══ Multiple collections combine karo ═══ db.sales2023.aggregate([ {…

Topic 8

🚀 `javascript // ═══ Missing values fill karo (time series gaps) ═══…

Topic 9

📚 `javascript // ═══ Missing values fill karo ═══ db.stocks.aggregate([ { $sort: { date: 1…

Topic 10

💡 `javascript // ═══ Random N documents ═══ db.products.aggregate([ { $sample: { size: 5 }…

Topic 11

🎯 `javascript // ═══ Document-level access control ═══ db.documents.aggregate([ { $redact:…

Topic 12

⭐ `javascript // ═══ User retention analysis (cohort) ═══ db.events.aggregate([ // Active…

Topic 13

🔑 KEY POINTS: - $facet = multiple pipelines parallel (faceted search!) -…

Quick Quiz

📘 MongoDB — Advanced Aggregation ka sabse sahi definition kya hai?

Complete! 🎉

Aliens School · HIEN · Cinematic Knowledge

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