update fields with a prefix - ?? how to

[lejeczek]

dear all, a novice here
quickie regarding query syntax - is it possible to take fields values 
from one column
and update the same column with new values like this: prefix_OldValue
column: one, two, three -> column: prefix_one, prefix_two, ...
can this be done with one query and with on use of abstractions, no php 
or similar scripting techincs?

cheers, lejeczek