Hello, I am learning the SQL code and don't know how to find the duplicate row and show it out. Here is the table person_no name birthday 01 John 01/01/2000 02 John 15/03/2000 03 Marry 21/06/2000 04 Peter 23/12/2000 05 Jerry 12/07/2000 The person_no is unique for everyone, but the name may be same, anyway to find the people with the same name but different person_no ? Sorry if my question bothers you