SQL: No order by in a subselect

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Obviously by the 'FETCH FIRST 20 ROWS ONLY' I am running V5R1.  Is there a
method to do what I am trying to do below - list the top 20 into a file?
Using the Order by clause in a subselect is not allowed.


      Insert into dirbig
      (SELECT IFSLDIR,IFSLOBJ,IFSLSIZ,CURRENT DATE
       FROM IFSLIST
       ORDER BY IFSLSIZ DESC
       FETCH FIRST 20 ROWS ONLY)


Now I am thinking that I will be stuck with a cursor loop.

I guess in the past the order by was only a minor frustration.  But now
with this fetch first it's getting to be more of a PITA.

Rob Berendt
--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
Benjamin Franklin