Ep 9: Window Functions in SQL Explained | ROW_NUMBER, RANK, DENSE_RANK, LAG, LEAD (BeginnerFriendly) скачать в хорошем качестве

Ep 9: Window Functions in SQL Explained | ROW_NUMBER, RANK, DENSE_RANK, LAG, LEAD (BeginnerFriendly)

In this video, we dive into *SQL Window Functions* using simple, beginner-friendly MySQL examples. link : https://drive.google.com/drive/folder... You’ll learn: ✔ ROW_NUMBER() ✔ RANK() ✔ DENSE_RANK() ✔ LAG() ✔ LEAD() ✔ Running Totals & Partitions —all without using CTEs or subqueries, so beginners can follow easily. We use our real dataset (company_demo) and show everything step-by-step inside MySQL Workbench. What You Will Learn • What a window function is • How OVER(), ORDER BY, and PARTITION BY work • Ranking employees based on salary • Finding previous and next values using LAG() and LEAD() • Creating running totals • Practical business examples for HR, Finance, and Analytics Who Is This For? • Data Analysts • SQL Beginners • Anyone preparing for interviews • Students who want hands-on SQL practice Why Window Functions Matter Window functions allow you to analyze data *without grouping* or writing complex subqueries. You can calculate rankings, compare rows, find gaps, and build analytics directly inside SQL. 📌 Make sure to watch Part 1 (String & Date Functions) and Part 2 (Math & Conversion Functions)! 💬 Have questions? Drop them in the comments—I reply to everyone. #sql #mysql #dataanalytics #windowfunctions #sqltutorial #sqlforbeginners #learnsql