This query will help you get the top most rows from the bottom. It may sound simple but complex, when you are not allowed to use the Primary key or unique key.
There may be many other ways..But I thought of this one way.
Note: VName is th column name of table mytable
--this query will give data from the last record
select * from mytable
Declare @NoOfRecord int
Set @NoOfRecord=2 --1 gives the last record --2 will give second last record
Select Top 1 VName from mytable
where VName not in (
(Select (Count(*)-@NoOfRecord) from mytable)