Skill Topic · Cinematic

📘 MongoDB — Indexes

Queries ko rocket-fast banao — indexes ka pura game! 🚀

Topic 1

📌 1. Index Kya Hai?

📚 ` Without Index (Collection Scan): ┌──┐┌──┐┌──┐┌──┐┌──┐┌──┐┌──┐┌──┐┌──┐┌──┐…

Topic 2

📌 2. Default _id Index

💡 `javascript // ═══ Har collection me _id par index automatically banta hai ═══…

Topic 3

📌 3. Single Field Index

🎯 `javascript // ═══ Ek field par index ═══ db.users.createIndex({ email: 1 }) // 1 =…

Topic 4

📌 4. Compound Index

⭐ `javascript // ═══ Multiple fields par index ═══ db.users.createIndex({ city: 1, age: -1…

Topic 5

📌 5. Unique Index

🔑 `javascript // ═══ Duplicate values prevent karo ═══ db.users.createIndex( { email: 1 },…

Topic 6

📌 6. Partial Index

✨ `javascript // ═══ Index sirf specific documents par ═══ db.orders.createIndex( { status:…

Topic 7

📌 7. Sparse Index

🌟 `javascript // ═══ Sirf documents jahan field EXISTS ═══ db.users.createIndex( {…

Topic 8

📌 8. TTL Index

🚀 `javascript // ═══ Auto-delete documents after time ═══ db.sessions.createIndex( {…

Topic 9

📌 9. Text Index

📚 `javascript // ═══ Full text search ke liye ═══ db.articles.createIndex({ title: "text",…

Topic 10

📌 10. Wildcard Index

💡 `javascript // ═══ Dynamic/unknown fields ke liye ═══ db.products.createIndex({…

Topic 11

📌 11. Hashed Index

🎯 `javascript // ═══ Equality queries ke liye (no range!) ═══ db.users.createIndex({ email:…

Topic 12

📌 12. Covered Query

⭐ `javascript // ═══ Query + Projection sirf index se satisfy ho ═══ // Collection tak…

Topic 13

📌 13. Index Management

🔑 `javascript // ═══ List all indexes ═══ db.users.getIndexes() // ═══ Drop index ═══…

Topic 14

📌 14. Index Best Practices

✨ ` ✅ DO: ───── • Query patterns pehle samjho, phir index banao • ESR rule follow karo…

Topic 15

✅ Summary

🌟 KEY POINTS: - Index = sorted B-tree for fast lookups (collection scan avoid) - _id index…

Quick Quiz

Quiz — Question 1

📘 MongoDB — Indexes ka sabse sahi definition kya hai?

Complete! 🎉

📘 MongoDB — Indexes Complete!

Aliens School · HIEN · Cinematic Knowledge

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