Leetcode 182. 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 |
+---------+

# Write your MySQL query statement below
select distinct p1.Email
from Person p1 inner join Person p2
on p1.Id>p2.Id
where p1.Email=p2.Email

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