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๐Ÿง  Topic 60: Advanced SQL โ€” Window Functions, CTEs & Beyond!

โฎ๏ธ Previous: 59-SQL-For-DS | โญ๏ธ Next: 61-NoSQL-Databases ๐Ÿ“‚ Section 8: Big Data & Databases (59-66)

Overview
๐ŸŒŸ

๐Ÿง  Topic 60: Advanced SQL โ€” Window Functions, CTEs & Beyond! โ€” Quick Facts

๐Ÿ“Œ

' > ': e.name

Topic 1
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

๐ŸŽฏ Is Topic Me Kya Sikhenge?

๐Ÿ“š ` โ•”โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•— โ•‘ ๐Ÿง  ADVANCED SQL โ€”โ€ฆ
Topic 2
โœจ

๐Ÿ“Œ Window Functions โ€” Kya Hai?

๐Ÿ’ก ` โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ” โ”‚ WINDOW FUNCTION vsโ€ฆ
Topic 3
โœจ

1๏ธโƒฃ Ranking Window Functions

๐ŸŽฏ `sql -- โ•โ•โ• ROW_NUMBER vs RANK vs DENSE_RANK โ•โ•โ• SELECT name, department, salary,โ€ฆ
Topic 4
โญ

2๏ธโƒฃ LAG & LEAD โ€” Previous/Next Row

โญ `sql -- โ•โ•โ• LAG: previous row value โ•โ•โ• -- Month-over-month revenue change SELECT month,โ€ฆ
Topic 5
โœจ

3๏ธโƒฃ Aggregate Window Functions

๐Ÿ”‘ `sql -- โ•โ•โ• Running Total โ•โ•โ• SELECT order_date, amount, SUM(amount) OVER ( ORDER BYโ€ฆ
Topic 6
โœจ ๐Ÿ“Š ๐Ÿ”ฌ

4๏ธโƒฃ CTEs (Common Table Expressions)

โœจ `sql -- โ•โ•โ• Basic CTE โ•โ•โ• WITH dept_stats AS ( SELECT dept_id, AVG(salary) AS avg_sal,โ€ฆ
Topic 7
โœจ

5๏ธโƒฃ Advanced Patterns

๐ŸŒŸ ` โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ” โ”‚ ADVANCED SQL PATTERNS โ”‚โ€ฆ
Topic 8
โœจ

๐Ÿ Full Python Class โ€” AdvancedSQLEngine

๐Ÿ’ก

Window functions (ROW_NUMBER,โ€ฆ

๐Ÿ”‘

Running totals & moving averages

โšก

CTEs (simple + recursive)

๐ŸŽฏ

Pivoting & unpivoting

Topic 9
๐Ÿ“š

๐Ÿ“Š Window Functions Quick Reference

๐Ÿ“š ` โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ฌโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ” โ”‚ Function โ”‚ Kya kartaโ€ฆ
Topic 10
โœจ

โ“ Quiz Time! (5 MCQs)

๐Ÿ’ก

a) Koi difference nahi

๐Ÿ”‘

b) ROW_NUMBER unique hota hai,โ€ฆ

โšก

c) RANK unique hota hai

๐ŸŽฏ

d) Dono same hain

Quick Quiz
๐Ÿง  QUIZ TIME

Quiz โ€” Question 1

๐Ÿง  Topic 60: Advanced SQL โ€” Window Functions, CTEs & Beyond! ka sabse sahi definition kya hai?

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๐Ÿง  Topic 60: Advanced SQL โ€” Window Functions, CTEs & Beyond! Complete!

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