🚀 15 SQL Window Function Interview Questions | RANK, DENSE_RANK, ROW_NUMBER, LEAD, LAG, NTILE

🚀 Solve These 15 SQL Window Function Interview Questions Before Your Next Data Analyst Interview! Window Functions are among the most frequently asked SQL topics in Data Analyst, Business Analyst, Data Engineer, and Analytics interviews. In this video, I'll solve 15 REAL SQL Window Function interview questions using Google Customer Data and explain every solution step-by-step. Instead of memorizing syntax, you'll learn how to approach real interview questions and write production-ready SQL. ━━━━━━━━━━━━━━━━━━━━━━ 📚 Window Functions Covered ✅ RANK() ✅ DENSE_RANK() ✅ ROW_NUMBER() ✅ LEAD() ✅ LAG() ✅ NTILE() ✅ PERCENT_RANK() ✅ Running Totals ✅ Moving Averages ✅ Top N Per Group ✅ Cumulative Sum ✅ Previous Day Analysis ✅ Business Reporting Scenarios ━━━━━━━━━━━━━━━━━━━━━━ 💼 SQL Interview Questions Covered ✔ Top 3 Customers by Order Amount ✔ Top Customer from Each Brand ✔ Latest Customer Interaction ✔ Best Caller by Date ✔ Difference Between RANK(), DENSE_RANK() & ROW_NUMBER() ✔ Running Total of Calls ✔ Rolling Average (Last 3 Days) ✔ Previous Day Call Comparison using LAG() ✔ Next Day Call Comparison using LEAD() ✔ Brand-wise Previous Day Calls ✔ Customer Segmentation using NTILE() ✔ Top 5% Customers using PERCENT_RANK() ━━━━━━━━━━━━━━━━━━━━━━ 🎯 Perfect For ✔ Data Analyst Interviews ✔ Business Analyst Interviews ✔ Data Engineer Interviews ✔ Analytics Engineer Interviews ✔ SQL Beginners ✔ Working Professionals ✔ College Students ━━━━━━━━━━━━━━━━━━━━━━ 📂 Dataset Included Google Customer Dataset ✔ Customers Table ✔ Customer Calls Table ✔ Customer Sales Table ━━━━━━━━━━━━━━━━━━━━━━ 📥 FREE SQL Practice Material Comment *"DATA"* below and I'll share: ✅ SQL Queries ✅ Dataset ✅ Practice Questions ━━━━━━━━━━━━━━━━━━━━━━ ⏱ Chapters ⏱️ Timestamps 00:00 – Data Understanding 01:06 – RANK() Window Functions 08:42 – Difference between RANK() , ROW_NUMBER() and DENSE_RANK() 12:47 – SUM() Window Functions 20:10 – LEAD() & LAG() Window Functions 26:19 – NTILE() & PERCENT_RANK() Window Functions ━━━━━━━━━━━━━━━━━━━━━━ 🎥 More SQL Videos 🔥 50+ SQL Interview Questions 🔥 SQL JOIN Interview Questions 🔥 Real SQL Projects 🔥 SQL Masterclass ━━━━━━━━━━━━━━━━━━━━━━ 👍 If you enjoyed this video: ✅ Like ✅ Share ✅ Subscribe 🔔 Turn on notifications for more SQL Interview Preparation videos every week! Happy Learning! 🚀 #sql #windowfunctions #sqlinterviewquestions #learnsql #dataanalyst #dataanalytics #sqltutorial #sqlpractice #dataengineer #businessanalyst #sqlcourse #sqlmasterclass #interviewpreparation #techcareers #100DaysSQLChallenge #sqlinterviewquestions #sqlinterviewquestionsandanswers