Get All ROW That Has a MAX Column Value of SQL Server 2008

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Setup:

declare @MyTable table(Year int, Month int, Day int, Total int)

insert @MyTable
values
    (2005, 9, 23, 12),
    (2005, 9, 26, 5),
    (2005, 9, 24, 1),
    (2005, 9, 15, 28),
    (2005, 9, 21, 1),
    (2005, 9, 13, 1),
    (2005, 10, 31, 5),
    (2005, 11, 18, 115),
    (2005, 11, 20, 1),
    (2005, 11, 11, 1),
    (2005, 11, 19, 1)

Query:

;with cte
as
(
    select *,
        row_number() over(partition by Year, Month order by Total desc) RowNumber
    from @MyTable
)
select Year, Month, Day, Total 
from cte
where RowNumber = 1

Conclusion:

Year        Month       Day         Total
----------- ----------- ----------- -----------
2005        9           15          28
2005        10          31          5
2005        11          18          115