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Leet Code | MySQL | 183. Customers Who Never Order 본문
183. Customers Who Never Order
https://leetcode.com/problems/customers-who-never-order/
Customers Who Never Order - LeetCode
Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
leetcode.com
Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL query to find all customers who never order anything.
SELECT c.Name AS Customers
FROM Customers As c
LEFT JOIN Orders As o ON c.id = o.Customerid
WHERE o.id IS NULL
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