[LeetCode]-DataBase-Duplicate Emails

Write a SQL query to find all duplicate emails in a table named Person.

+----+---------+
| Id | Email   |
+----+---------+
| 1  | a@b.com |
| 2  | c@d.com |
| 3  | a@b.com |
+----+---------+

For example, your query should return the following for the above table:

+---------+
| Email   |
+---------+
| a@b.com |
+---------+

需求：查询多次出现的邮箱

CREATE TABLE Person(
Id TINYINT UNSIGNED,
Email VARCHAR(20)
)ENGINE=MyISAM CHARSET=utf8;

SELECT Email
FROM Person
GROUP BY Email
HAVING COUNT(Email)>1