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SQL Interview Question 🔥 Count Unique Callers Within 7 Days | LAG + INTERVAL Explained
In this video, we solve a real SQL interview question asked by UnitedHealth Group (UHG).
Problem Statement:
Find the number of unique policy holders who made calls within a 7-day interval of their previous calls. If a caller made multiple calls within 7 days, count them only once.
Topics Covered:
✅ LAG() Window Function
✅ INTERVAL in SQL
✅ COUNT DISTINCT
✅ Real Interview SQL Logic
✅ Step-by-Step Explanation
This video is perfect for:
✔ SQL Interviews
✔ Data Analyst Preparation
✔ Data Engineer Practice
✔ SQL Beginners & Intermediate Learners
🔥 If you found this helpful, Like, Share & Subscribe for more SQL interview questions.
#SQL #SQLInterviewQuestions #WindowFunctions #DataAnalytics #LAGFunction #LearnSQL #SQLPractice #InterviewPreparation
Видео SQL Interview Question 🔥 Count Unique Callers Within 7 Days | LAG + INTERVAL Explained канала The Data Dose
Problem Statement:
Find the number of unique policy holders who made calls within a 7-day interval of their previous calls. If a caller made multiple calls within 7 days, count them only once.
Topics Covered:
✅ LAG() Window Function
✅ INTERVAL in SQL
✅ COUNT DISTINCT
✅ Real Interview SQL Logic
✅ Step-by-Step Explanation
This video is perfect for:
✔ SQL Interviews
✔ Data Analyst Preparation
✔ Data Engineer Practice
✔ SQL Beginners & Intermediate Learners
🔥 If you found this helpful, Like, Share & Subscribe for more SQL interview questions.
#SQL #SQLInterviewQuestions #WindowFunctions #DataAnalytics #LAGFunction #LearnSQL #SQLPractice #InterviewPreparation
Видео SQL Interview Question 🔥 Count Unique Callers Within 7 Days | LAG + INTERVAL Explained канала The Data Dose
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29 апреля 2026 г. 15:38:12
00:09:24
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