SQL Tampilkan catatan terbaru di GROUP BY?

Mulailah dengan ini:

select StudentId, max(DateApproved) 
from tbl
group by StudentId

Kemudian integrasikan itu ke kueri utama:

select * 
from tbl
where (StudentId, DateApproved) in

(
  select StudentId, max(DateApproved) 
  from tbl
  group by StudentId
)

Anda juga dapat menggunakan ini:

select * 
from tbl
join (select StudentId, max(DateApproved) as DateApproved 
      from tbl 
      group by StudentId)
using (StudentId, DateApproved)

Tapi saya lebih suka pengujian Tuple, caranya lebih rapi

Tes langsung:http://www.sqlfiddle.com/#!2/771b8/ 5