Skill Topic · Cinematic

📊 Topic 09: Subqueries — Query Ke Andar Query!

"A query inside a query — that's the inception of SQL!" — Unknown "Pehle ek sawaal ka jawab nikalo,…

Overview

📊 Topic 09: Subqueries — Query Ke Andar Query! — Quick Facts

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name: marks

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Rahul Sharma: 85

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Priya Singh: 92

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Neha Gupta: 95

Topic 1

1. Subquery Kya Hai?

📚 Subquery = Ek SELECT query jo dusri query ke ANDAR likhi jaati hai. `…

Topic 2

2. WHERE Me Subquery

💡 Comparison with Single Value: `sql -- ═══════════════════════════════════════════ --…

Topic 3

3. Scalar Subquery — Ek Value

🎯 Scalar Subquery = Sirf EK value return kare (1 row, 1 column). `sql --…

Topic 4

4. Column Subquery — Multiple Values

⭐ Column Subquery = Multiple rows, 1 column. IN/NOT IN ke saath use hoti hai. `sql --…

Topic 5

5. IN / NOT IN with Subquery

🔑 IN — Values me se koi ek match: `sql -- ═══════════════════════════════════════════ --…

Topic 6

6. EXISTS / NOT EXISTS

✨ EXISTS = Check karo ki subquery me koi row hai ya nahi (True/False). NOT IN se safe aur…

Topic 7

7. Correlated Subquery

🌟 Correlated Subquery = Inner query outer query ke data pe depend karti hai. Har row ke…

Topic 8

8. Subquery in SELECT

🚀 Columns me subquery likho: `sql -- ═══════════════════════════════════════════ -- Har…

Topic 9

9. Subquery in FROM (Derived Table)

📚 FROM me subquery likho — ek temporary table ban jaati hai: `sql --…

Topic 10

10. Key Points

💡 ` ╔══════════════════════════════════════════════════════╗ ║ 📝 KEY POINTS ║…

Topic 11

📝 Practice Exercises

🎯 Exercise 1: Basic Subqueries 1. Average marks se zyada wale students nikalo 2. Sabse…

Topic 12

🧭 Navigation

⭐ | Previous | Index | Next | |----------|-------|------| | ← JOINs | 📚 Course Index |…

Quick Quiz

Quiz — Question 1

📊 Topic 09: Subqueries — Query Ke Andar Query! ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

📊 Topic 09: Subqueries — Query Ke Andar Query! ka 'Rahul Sharma' kya hai?

Complete! 🎉

📊 Topic 09: Subqueries — Query Ke Andar Query! Complete!

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