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# [596\. 超過5名學生的課](https://leetcode-cn.com/problems/classes-more-than-5-students/)  ``` SELECT class FROM courses GROUP BY class having count(distinct(student)) >= 5 ```
基礎篇
組合兩個表
182. 查找重復的電子郵箱
176. 第二高的薪水
181. 超過經理收入的員工
183. 從不訂購的客戶
196. 刪除重復的電子郵箱
197. 上升的溫度
595. 大的國家
596. 超過5名學生的課
中等篇
178. 分數排名
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