🚗 Trips and Users – SQL Interview Challenge Breakdown
In this tutorial, we walk through a real-world SQL interview problem involving trip and user activity data — very similar to what you'd see at companies like Uber, DoorDash, Lyft, Amazon, and Facebook.
You’ll be asked to analyze which users took trips, who didn’t, and how to calculate relevant ratios — a common pattern in Data Engineering interviews involving JOINs, filtering logic, and aggregations.
✅ What You’ll Learn:
How to join user and trip tables correctly
Using LEFT JOIN, IS NULL, and conditional logic to segment data
Calculating usage ratios and activity percentages
Real interview tips to make your SQL answer stand out
🎯 Great For:
Data Engineers
Analysts
SQL Prep for FAANG & startups
Anyone learning relational joins with business context
🧠 Difficulty: Medium
🧰 SQL Flavor: MySQL / PostgreSQL / BigQuery compatible
🚀 This kind of behavioral analytics SQL is a must-know for roles in ride-sharing, e-commerce, and SaaS companies. Understanding how to combine users and event data gives you a big edge in real interviews.
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0:00 Problem Explanation
1:39 Solution Intro
2:18
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