Skill Topic · Cinematic

📘 MongoDB — Time Series Collections

IoT, metrics, logs — time-based data ko efficiently store karo! ⏱️

Overview

📘 MongoDB — Time Series Collections — Quick Facts

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"minutes": "hours"

Topic 1

📌 1. Time Series Kya Hai?

📚 ` Time Series Data = data jo time ke saath record hota hai Examples: • IoT sensor…

Topic 2

📌 2. Create Time Series Collection

💡 `javascript // ═══ MongoDB 5.0+ feature ═══ db.createCollection("sensor_data", {…

Topic 3

📌 3. Insert Data

🎯 `javascript // ═══ Single insert ═══ db.sensor_data.insertOne({ timestamp: new Date(),…

Topic 4

📌 4. Query Time Series

⭐ `javascript // ═══ Basic time range query ═══ db.sensor_data.find({ timestamp: { $gte:…

Topic 5

📌 5. Aggregation on Time Series

🔑 `javascript // ═══ Hourly average ═══ db.sensor_data.aggregate([ { $match: {…

Topic 6

📌 6. Gap Filling & Densify

✨ `javascript // ═══ $densify — Fill missing time intervals ═══ // MongoDB 5.1+ // Problem:…

Topic 7

📌 7. Auto-Deletion (TTL)

🌟 `javascript // ═══ expireAfterSeconds — auto cleanup ═══ // Already set during creation:…

Topic 8

📌 8. Secondary Indexes

🚀 `javascript // ═══ Time series collections support indexes ═══ // Compound index — common…

Topic 9

📌 9. Practical Example: Server Monitoring

📚 `javascript // ═══ Create collection ═══ db.createCollection("server_metrics", {…

Topic 10

📌 10. Time Series vs Normal Collection

💡 | Feature | Time Series Collection | Normal Collection |…

Topic 11

✅ Summary

🎯 KEY POINTS: - Time Series = MongoDB 5.0+ feature for time-based data - timeField…

Comparison

📌 10. Time Series vs Normal Collection

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Storage: Compressed (up to 90% less)

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Write speed: Optimized for inserts

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Time range queries: Very fast

Quick Quiz

Quiz — Question 1

📘 MongoDB — Time Series Collections ka sabse sahi definition kya hai?

Complete! 🎉

📘 MongoDB — Time Series Collections Complete!

Aliens School · HIEN · Cinematic Knowledge

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