SQL Server:ИЗБЕРЕТЕ само редовете с MAX(DATE)

Ако rownumber() over(...) е на разположение за вас ....

select OrderNO,
       PartCode,
       Quantity
from (select OrderNO,
             PartCode,
             Quantity,
             row_number() over(partition by OrderNO order by DateEntered desc) as rn
      from YourTable) as T
where rn = 1