double sorted selection from a single table

Question

I have a table with an id as the primary key, and a description as another field.

I want to first select the records that have the id<=4, sorted by description, then I want all the other records (id>4), sorted by description. Can't get there!

Answer 1

select id, descr
from t
order by 
 case when id <= 4 then 0 else 1 end, 
 descr

Answer 2

select *, id<=4 as low from table order by low, description