SQL Query:Kembalikan catatan nilai Maks dari Grup

gunakan row_number() fungsi jendela

select * from
 ( select *,
  row_number()over(partition by s_name order by MARK_VALUE desc) rn
 from table_name
) t where t.rn=1

atau Anda dapat menggunakan subkueri terkait

select t1.* from table_name t1
  where t.MARK_VALUE=(select max(MARK_VALUE) from table_name t2 where t2.S_NAME=t1.S_NAME)