SQL Interview Question For Data Analyst | Part 6 | Tuning Data

SQL Interview Question For Data Analyst
Learn how to calculate Customer Churn Rate using SQL Cohort Analysis in this step-by-step tutorial! Perfect for aspiring data analysts preparing for interviews.

In this video, I solve a real-world SaaS business problem for "TaskFlow" - a project management tool that needs to track customer retention and churn patterns month-over-month.

🎯 What You'll Learn:
- How to build cohort analysis from scratch using SQL
- Calculate retention rate and churn rate percentage
- Use CTEs (Common Table Expressions) for complex analysis
- Apply DATE_TRUNC, AGE, and EXTRACT functions
- Solve real data analyst interview questions

💼 Business Context (Why This Matters):
✅ Revenue Loss Prevention
✅ Product Issue Identification
✅ Marketing ROI Measurement
✅ Retention Strategy Development
✅ Investor Reporting

📊 SQL Concepts Covered:
- WITH clause and multiple CTEs
- Window functions and aggregations
- Date manipulation functions
- JOIN operations
- Percentage calculations with ROUND

🔗 Connect With Me:
📸 Instagram: https://www.instagram.com/tuning.data/
💼 LinkedIn: https://www.linkedin.com/in/reactwithrajeev/
🐙 GitHub: https://github.com/reactwithrajeev/SQL_100_Real_Business_Question_
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