[OCM/WCM] Sql in order_by section.

Is it possible to use SQL expressions in the order_by section?
I am asking because I am looking for an idea to sort records by the values of the text field. This field contains such values: 30_60, 60_100, 100_150, 150+.
I will be grateful for any suggestions.

i use Genesys Administrator 8.1.309.02

I have used something like this:

order by 
(select 
case column_userdata_2
when 4 then 1 
when 1 then 2 
when 2 then 3 
Else 4 
End
)