problema con la funzione except

qualcuno sa dirmi cosa c' di sbagliata in questa query:
EXCEPT
({ SELECT idAttach
FROM tbAttachs }, {
SELECT idAttach
FROM tbAttachsForPages
WHERE (idPage = 2) })
graziealidicera <samarcanda@.nospambbs.olografix.org> wrote in message news:<16hyw7zwzctkz.ei7eq6l4y1wn$.dlg@.40tude.net>...
> qualcuno sa dirmi cosa c' di sbagliata in questa query:
> EXCEPT
> ({ SELECT idAttach
> FROM tbAttachs }, {
> SELECT idAttach
> FROM tbAttachsForPages
> WHERE (idPage = 2) })
> grazie

You might want to post this in microsoft.public.sqlserver.olap,
assuming that EXECPT() in this case is the Analysis Services function.
But you should provide some more information - what does the complete
query look like, how are you executing it, what error or problem do
you get, etc.

Simon