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-- @Title: 查找重复的电子邮箱 (Duplicate Emails)
-- @Author: 15816537946@163.com
-- @Date: 2021-03-03 14:35:24
-- @Runtime: 243 ms
-- @Memory: 0 B
# Write your MySQL query statement below

select Email 
from Person
group by Email
having
count(distinct Id) >1