# 182. 查找重复的电子邮箱

### Link

{% embed url="<https://leetcode.cn/problems/duplicate-emails/>" %}

### Problem

编写一个 SQL 查询，查找 `Person` 表中所有重复的电子邮箱。

示例 1：

{% code overflow="wrap" %}

```
+----+---------+
| Id | Email   |
+----+---------+
| 1  | a@b.com |
| 2  | c@d.com |
| 3  | a@b.com |
+----+---------+
根据以上输入，你的查询应返回以下结果：

+---------+
| Email   |
+---------+
| a@b.com |
+---------+
说明：所有电子邮箱都是小写字母。
```

{% endcode %}

### Solution

{% tabs %}
{% tab title="MySQL" %}

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

{% endtab %}
{% endtabs %}