In this video, I explore one of the most common SQL interview questions for Data Analyst and Power BI Analyst roles: Finding employees with duplicate emails in a database.
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🔍 What You'll Learn:
📌How to identify duplicate emails using GROUP BY and HAVING
📌Using subqueries to find duplicates
📌Leveraging window functions like ROW_NUMBER and COUNT to detect duplicates
📌Employing self-joins to solve the duplicate email problem
By understanding these different methods, you'll be better prepared for your SQL interviews and enhance your SQL skills. Whether you're a beginner or looking to refine your techniques, this video has something for you.
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🔗 Check out my other videos on SQL, Power BI, and more:
Excel for beginners: ua-cam.com/play/PLeBLWEII-zzhCYZ-bdbsENh0sjDAVhSgD.html
SQL: ua-cam.com/play/PLeBLWEII-zzg6y2xhf6v1jLEx8hXHOyIK.html
Power BI tutorial: ua-cam.com/play/PLeBLWEII-zzhHF4eeWbGAsBt9Uw7ehP4x.html
Scenario based questions with solutions in PBI: ua-cam.com/play/PLeBLWEII-zzjmdXSN7CWf3Dc-8KSmDPuK.html
Interview preparation for data analytics: ua-cam.com/play/PLeBLWEII-zzjf9jASzcr-niYpHLvQ1szE.html
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