LeetCode182. 查找重复的电子邮箱

问题描述：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。
所用的表和数据

Create table If Not Exists Person (Id int,Email varchar(255));
Truncate table Person;
insert into Person (Id, Email) values ('1','[email protected]');
insert into Person (Id, Email) values ('2','[email protected]');
insert into Person (Id, Email) values ('3','[email protected]');

解决方法：

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