text: -- 182. Duplicate Emails
  
  -- Runtime: 754 ms, faster than 16.41% of MySQL online submissions for Duplicate Emails.
  
  -- Memory Usage: 0B, less than 100.00% of MySQL online submissions for Duplicate Emails.
  
  
  -- Using `GROUP BY` and `HAVING` condition.
  select Email
  from Person
  group by Email
  having count(Email) > 1
  ;