Union on view and..

Hi, all,

Could somebody tell me if there is a work around to 
create "union on view" (which seems not implemented
in the postgres yet) ?

Also, is there any alternative query that can do:

select * from (select * from table);

I could not find an answer from the old archieve,
and sorry if this has been answered previously.
(I am new here :)

Regards,
Jae