LeetCode SQL 584: Find Customer Referee | Step-by-Step Solution

🔍 LeetCode SQL 178: Finding Customer Referees | Step-by-Step Solution

In this video, we’ll be solving LeetCode SQL Problem #178: Finding Customer Referees. Whether you’re prepping for an SQL interview or aiming to sharpen your skills, this tutorial will help you master essential SQL techniques.

📌 Problem Overview: The task is to write a SQL query to find all customers who have referees. We’ll go over the solution in detail, explaining each part of the query and demonstrating best practices for efficient problem-solving.

💻 What You’ll Learn:

SQL JOIN operations for combining tables
Using WHERE conditions to filter data based on relationships
Practical examples of how to query relational data
Techniques to write clean, optimized SQL code
Topics Covered:

SQL SELECT, COALESCE FUNCTION, WHERE clauses
Filtering data based on relationships between columns
Querying data to extract customer details based on referee information
Who Should Watch This Video?

SQL beginners who want to understand relational data querying
Intermediate users looking to practice common SQL interview problems
Anyone preparing for technical interviews that involve SQL questions
🔗 LeetCode Problem Link: Finding Customer Referees

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