LeetCode刷题(python)—— 182. 查找重复的电子邮箱

题目描述:

编写一个 SQL 查询,查找 Person 表中所有重复的电子邮箱。

示例:

+----+---------+
| Id | Email   |
+----+---------+
| 1  | [email protected] |
| 2  | [email protected] |
| 3  | [email protected] |
+----+---------+

根据以上输入,你的查询应返回以下结果:

+---------+
| Email   |
+---------+
| [email protected] |
+---------+

说明:所有电子邮箱都是小写字母。

代码实现:

# Write your MySQL query statement below
select Email from Person group by Email having count(Email) > 1

 

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