SQL - Select unique rows from a group of results

Question

I have wrecked my brain on this problem for quite some time. I\'ve also reviewed other questions but was unsuccessful.

The problem I have is, I have a list of results/t

Answer 1

select registration,ID,date,unittype
from your_table
where (registration, date) IN (select registration,max(date)
                            from your_table
                            group by registration)