First, read the Indonesian article below.

Setelah "SQL", masukkan "select * from names;" untuk dapat melihat baris. Setelah "SQL'" masukkan "delete from names a where rowid > (select min(rowid) from names b where b.name=a.name and b.age=a.age);" untuk menghapus catatan duplikat. Setelah Anda menyelesaikan langkah di atas, masukkan "select * from names;" kemudian "commit" untuk memastikan apakah duplikat benar-benar sudah dihapus.     SQL > select * from names; NAMA                             USIA ------------------------------ ---------- Alan                                   50 Citra                                   51 Tomi                                  52 Alan                                   50 rows selected. SQL > delete from names a where rowid > (select min(rowid) from names b where b.name=a.name and b.age=a.age ); row deleted. SQL > select * from names; NAMA                              USIA ------------------------------ ---------- Alan                                   50 Citra                                   51 Tomi                                    52 rows selected. SQL > commit; Commit complete. 

Now, please write a short abstract for it in Vietnamese. Abstract:
Chọn dòng. Xóa những dòng giống nhau bằng cách xác định cột của chúng. Kiểm tra dữ liệu trùng lặp.