retrieve resultset based on where clause condition order in sql server -

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consider following table

colid  value       100   b     200   c     300   d     400   e     500

what query retrieving values colid 'c','a','d' in same order?

for particular ordering have like:

select * mytable colid in ('c', 'a', 'd')     order        case colid           when 'c' 0           when 'a' 1           else 2        end

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