Keep order from 'IN' clause

Question

Is it possible to keep order from a \'IN\' conditional clause?

I found this question on SO but in his example the OP have already a sorted \'IN\' clause.

My

Answer 1

There is an alternative that uses string functions:

with const as (select ',45,2,445,12,789,' as vals)
select tr.*
from TestResult tr cross join const
where instr(const.vals, ','||cast(tr.somefield as varchar(255))||',') > 0
order by instr(const.vals, ','||cast(tr.somefield as varchar(255))||',')

I offer this because you might find it easier to maintain a string of values rather than an intermediate table.