Sql query to get filesizes from a MOSS wss database

select [filename],
sum(CAST((CAST(CAST(filesize as decimal(38,2))/1024 As 
      decimal(38,2))/1024) AS Decimal(38,2))) AS 'Size in MB'
from (
    select dirname + '/' + leafname as [filename],
           size as filesize,
           siteid,
           webid,
             ExtensionForFile
    from alldocs
    union
    select d.dirname + '/' + d.leafname as [filename],
           v.size as filesize,
           d.siteid,
           d.webid,
             ExtensionForFile
    from alldocs d
    inner join alldocversions v on d.siteid = v.siteid
    and d.id = v.id
) as results
inner join webs s on s.siteid = results.siteid
and s.id = results.webid
where (filesize is not null
  and filesize > 0)
    and ExtensionForFile not like '%aspx%' -- Not Include Certian File Types
group by 
[Filename]
order by 2 desc