🧑‍💼 LeetCode SQL Problem - Find Customer Referee | Part 2✨

🧑‍💼 LeetCode SQL Problem - Find Customer Referee | Part 2

Welcome back to our SQL LeetCode series! In this video, we dive into “Find Customer Referee – Part 2”, a commonly asked SQL interview question that sharpens your filtering and NULL-handling skills.

🔍 Problem Objective:
Write an SQL query to find the names of customers who do not have a referee or whose referee is not ID = 2.

📘 Key Concepts Covered:
✅ Working with NULL values in SQL
✅ Using WHERE clause with multiple conditions
✅ Logical operators like IS NULL and !=
✅ Filtering rows based on foreign key relationships
💼 Great for:

SQL interview preparation

Practicing real-world SQL queries

Beginners learning how to handle NULLs and conditions

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Видео 🧑‍💼 LeetCode SQL Problem - Find Customer Referee | Part 2✨ канала Shahi_works