SQL Server: Only last entry in GROUP BY

Question

I have the following table in MSSQL2005

id | business_key | result
1 | 1 | 0
2 | 1 | 1
3 | 2 | 1
4 | 3 | 1
5 | 4 | 1
6 | 4 | 0

And now i wa

Answer 1

select
  drv.business_key,
  mytable.result
from mytable
  inner join
  (
    select 
      business_key, 
      max(id) as max_id
    from mytable
    group by
      business_key
  ) as drv on
    mytable.id = drv.max_id