How do I exclude outliers from an aggregate query?

Question

I\'m creating a report comparing total time and volume across units. Here a simplification of the query I\'m using at the moment:

SELECT  m.Unit,
        COUNT(         


        

Answer 1

One way would be to exclude the outliers with a not in clause:

where  m.ID not in 
       (
       select  top 5 percent ID
       from    main_table 
       order by 
               TimeInMinutes desc
       )

And another not in clause for the bottom five percent.