SQL Meest recente record weergeven in GROUP BY?

Begin hiermee:

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

Integreer dat dan in de hoofdquery:

select * 
from tbl
where (StudentId, DateApproved) in

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

Je kunt dit ook gebruiken:

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

Maar ik geef de voorkeur aan tuple-testen, het is een manier van netter

Live-test:http://www.sqlfiddle.com/#!2/771b8/ 5