Delete Duplicate Emails

• Problem
  Write a SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its smallest Id.
  +----+------------------+
  | Id | Email |
  +----+------------------+
  | 1 | [email protected] |
  | 2 | [email protected] |
  | 3 | [email protected] |
  +----+------------------+
  Id is the primary key column for this table.
  For example, after running your query, the above Person table should have the following rows:
  +----+------------------+
  | Id | Email |
  +----+------------------+
  | 1 | [email protected] |
  | 2 | [email protected] |
  +----+------------------+

• Code
  delete from Person where Id not in (select * from (select min(Id) from Person group by Email) t);