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Leetcode has a great range of practice database and SQL questions.

In this video, I'll explain one of these practice questions, and demonstrate three different ways that it can be solved, along with some common issues that you'll find along the way.

We're working on Leetcode question 183: Customers Who Never Order.
Link: https://leetcode.com/problems/custome...

⏱ TIMESTAMPS:
00:00 - The problem
01:49 - Solution 1
07:02 - Solution 2
08:46 - Solution 3