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🏛️ Topic 13: Database Design — Sahi Structure Banao!

"A database is only as good as its design — fix it before you build, not after!" — Unknown "Ghar…

Overview

🏛️ Topic 13: Database Design — Sahi Structure Banao! — Quick Facts

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Previous: Index

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[← Transactions & ACID](./12_SQL_Transactions.md): 📚 Course Index

Topic 1

1. Database Design Kya Hai?

📊 Database Design = Tables kaise banayein, columns kya hon, relationships kya hon — yeh…

Topic 2

2. ER Diagrams (Entity-Relationship)

💾 ER Diagram = Database ka visual map! Tables (entities) aur unke connections…

Topic 3

3. Relationships (1:1, 1:M, M:M)

🗄️ One-to-One (1:1): ` ┌──────────────────────────────────────────────────────┐ │ 1:1 = Ek…

Topic 4

4. Normalization — Data Clean Karo

📈 Normalization = Database se duplicate data aur anomalies hatana! Tables ko properly…

Topic 5

5. 1NF — First Normal Form

🔍 Rule: Har cell me sirf EK value honi chahiye (atomic!) No repeating groups, no lists, no…

Topic 6

6. 2NF — Second Normal Form

📉 Rule: 1NF + har non-key column POORE primary key pe depend kare, partial dependency nahi!…

Topic 7

7. 3NF — Third Normal Form

🧮 Rule: 2NF + koi non-key column doosre non-key column pe depend na kare (no transitive…

Topic 8

8. Denormalization — Kab Rules Todo

🌐 Normalization sometimes over-normalize kar deta hai — bahut saare JOINs = slow queries.…

Topic 9

9. Real-World Database Designs

📊 Design 1: School Management System ` ┌────────────┐ ┌────────────┐ ┌────────────┐ │…

Topic 10

10. Key Points

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

Topic 11

📝 Practice Exercises

🗄️ Exercise 1: ER Diagram 1. Library system ka ER diagram banao (Books, Members, Borrowings)…

Topic 12

🧭 Navigation

📈 | Previous | Index | Next | |----------|-------|------| | ← Transactions & ACID | 📚…

Quick Quiz

Quiz — Question 1

🏛️ Topic 13: Database Design — Sahi Structure Banao! ka sabse sahi definition kya hai?

Complete! 🎉

🏛️ Topic 13: Database Design — Sahi Structure Banao! Complete!

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