Skill Topic · Cinematic

📘 SQL NULL Functions - NULL Values Ko Handle Karna

NULL Functions se tum NULL values ko meaningful values se replace kar sakte ho — calculations mein…

Overview

📘 SQL NULL Functions - NULL Values Ko Handle Karna — Quick Facts

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ProductID: ProductName

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1: Keyboard

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2: Mouse

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3: Monitor

Topic 1

📌 NULL Ka Problem Kya Hai?

📚 Jab kisi column me NULL ho aur tum calculation karo, to result bhi NULL aa jaata hai.…

Topic 2

📌 Demo Database

Topic 3

📌 IFNULL() — MySQL

🎯 `sql -- MySQL: NULL ko 0 se replace karo SELECT ProductName, Price, IFNULL(Discount, 0)…

Topic 4

📌 COALESCE() — All Databases (Universal!)

⭐ `sql -- COALESCE: Pehli non-NULL value return karta hai SELECT ProductName,…

Topic 5

📌 ISNULL() — SQL Server

🔑 `sql -- SQL Server: ISNULL function SELECT ProductName, ISNULL(Discount, 0) AS Discount,…

Topic 6

📌 NVL() — Oracle

✨ `sql -- Oracle: NVL function SELECT ProductName, NVL(Discount, 0) AS Discount, Price -…

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📌 Database Compatibility

Topic 8

📌 COALESCE vs IFNULL

🚀 | Feature | IFNULL / ISNULL / NVL | COALESCE |…

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📌 Practical Examples

📚 Total Calculation: `sql -- Total cost calculate karo (NULL-safe) SELECT ProductName,…

Topic 10

📌 NULLIF() — Bonus Function

💡 NULLIF() ulta kaam karta hai — agar do values barabar hon to NULL return karta hai: `sql…

Topic 11

✅ Summary

🎯 KEY POINTS: - NULL se calculation karo to result NULL aata hai - IFNULL(expr, val) —…

Comparison

📌 COALESCE vs IFNULL

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Arguments: Sirf 2

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Portability: Database-specific

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Fallback chain: ❌

Quick Quiz

Quiz — Question 1

📘 SQL NULL Functions - NULL Values Ko Handle Karna ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

📘 SQL NULL Functions - NULL Values Ko Handle Karna ka '1' kya hai?

Complete! 🎉

📘 SQL NULL Functions - NULL Values Ko Handle Karna Complete!

Aliens School · HIEN · Cinematic Knowledge

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