182. Duplicate Emails

Easy

Table: Person

+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| id          | int     |
| email       | varchar |
+-------------+---------+
id is the primary key column for this table.
Each row of this table contains an email. The emails will not contain uppercase letters.

Write an SQL query to report all the duplicate emails.

Return the result table in any order.

The query result format is in the following example.

Example 1:

Input: 
Person table:
+----+---------+
| id | email   |
+----+---------+
| 1  | [e-mail] |
| 2  | [e-mail] |
| 3  | [e-mail] |
+----+---------+
Output:
 
+---------+
| Email   |
+---------+
| [e-mail] |
+---------+
Explanation:
 [e-mail] is repeated two times.

解題

# Write your MySQL query statement below
SELECT email
FROM Person
GROUP BY email
HAVING count(*) > 1