LeetCode 584: Find Customer Referee Solution
Master LeetCode problem 584 (Find Customer Referee), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
584. Find Customer Referee
Problem Explanation
Explanation:
To solve this problem, we can use a SQL query to select the names of customers who are not referred by the customer with id = 2. We can achieve this by using a LEFT JOIN to join the Customer table with itself on the id and referee_id columns, then filtering out the rows where the referee id is 2.
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SQL Solution:
Solution Code
// This problem is solved using SQL query, no Java solution required.Try It Yourself
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