SQL Report for all document below a particular folder in the tree

Hi all

I'm trying to develop an SQL query that would list all documents below and including a folder (or work area) in projectwise, irrespective of how many subfolders down they are. 

I've figured out how I could do it all the files where in folders where only one level below the parent (see my initial thoughts below) but I'm not sure how about getting it to include level 2, 3 and 4 etc. etc. without prespecifing the folder id's: which I don't want to do since they won't necessarily be static.

(

select
o_docguid,
o_filename,
dms_doc.o_projectno,
dms_proj.o_parentno,
o_itemname,
o_itemno,
o_itemdesc
from [dms_doc]
FULL OUTER JOIN [dms_proj] on dms_doc.o_projectno = dms_proj.o_projectno
where dms_proj.o_parentno = '1907'

)

Cheers

Matt