Choosing between t and s field types

[Ninad Raut]

Hi,
I want certain fields of type int,float and date to be sortable and I should
be able to run my range queries as well as facet queries on those fields.
Now as far as I know sint,sfloat fieldtypes  make the fields sortable and
tint,tfloat,tdate allow range queries on the fields.
I want both these features in my fields. How can I make this happen?