Finding the decade with largest records, SQL Server

Question

I have the following db diagram :

I want to find the decade (for example 1990 to 2000) that has the most number of movies. Actually it only deals with "

Answer 1

select substring(cast([year] as varchar), 1, 3) as Decade,
Count(1) [Count]
from Movies
group by substring(cast([year] as varchar), 1, 3)
order by 2 desc