Question : Grab last two lab results

I need to grab the last two lab results from a table by date. How do I do this? I can grab max but not sure how to grab the last two. If there are 10 results I just want the last two

Answer : Grab last two lab results

select * from
(
select *,
  rn=row_number() over (partition by patientid order by date desc) -- rank for each patient by latest date
from tbl
) SQ
where rn<=2  --- only top 2