text: # Write your MySQL query statement below
  
   #delete from Person where Id in (select * from (select t1.Id from Person t1,Person t2 where t1.Id>t2.Id and
   #t1.Email = t2.Email) A)
   delete t1  from Person t1,Person t2 where t1.Id>t2.Id and t1.Email = t2.Email
  
   /*todo delete 也可以进行多表*/