Oracle queries duplicate data and deletes it, leaving only one piece of data duplicate data

In recent interviews, I encountered such a database question:

Delete duplicate data in the table, and keep only one duplicate data.

　　Ideas:

　　　　1) This question needs to use the rowid, first find the rowid of the duplicate data, and find the maximum or minimum value of the rowid as a condition for deletion;

　　　　　　select min(rowid) from aa group by Name having count(Name) > 1

　　　　2) Find the name with a number greater than 1 according to the name

　　　　　　select name from aa group by name having count(name) > 1

　　　　3) Perform the delete operation according to the above two conditions

　　　　　　delete from aa t where t.name in (select name from aa group by name having count(name) > 1) 

　　　　　　　　and rowid not in (select min(rowid) from aa group by Name having count(Name) > 1);