Need help with union of two selects

Question

select 1 selects items for a timespan.
But if there is nothing found at one date,
the date is not returned so I want a union with a calendar table
Both selects work but how to make the union?
Thanks for any help!
select 1:
SELECT COUNT(*) COUNT,
fb_operation prodstep,
kalenderwoche datum
FROM stoerung,
kalender
WHERE str_kommenzeit > to_date('13.06.2006', 'dd.mm.yyyy')
AND str_kommenzeit < to_date('11.07.2006', 'dd.mm.yyyy')
AND to_char(str_kommenzeit,'dd.mm.yyyy') = to_char(fulldate,'dd.mm.yyyy')
GROUP BY fb_operation,
kalenderwoche
ORDER BY fb_operation,
kalenderwoche
select 2:
SELECT kalenderwoche datum
from kalender
WHERE fulldate > to_date('13.06.2006', 'dd.mm.yyyy')
AND fulldate < to_date('11.07.2006', 'dd.mm.yyyy')

Answer 1

THANKS A LOT!
I tested it and it gave me good results
the problem I still have is that then I expand the Date to
to_date('11.12.2006') I just get the weeks
that contain data. But I need all weeks that are selected, if there is
no data the other fields shall be null or 0.
This is much too difficult for me perhaps you can also help me with this!
select * from
(SELECT COUNT(*) COUNT,
fb_operation prodstep,
kalenderwoche datum
FROM stoerung,
kalender
WHERE str_kommenzeit > to_date('13.06.2006', 'dd.mm.yyyy')
AND str_kommenzeit < to_date('11.12.2006', 'dd.mm.yyyy')
AND to_char(str_kommenzeit,'dd.mm.yyyy') = to_char(fulldate,'dd.mm.yyyy')
GROUP BY fb_operation,
kalenderwoche
ORDER BY fb_operation,
kalenderwoche) A,
(SELECT kalenderwoche datum
from kalender
WHERE fulldate > to_date('13.06.2006', 'dd.mm.yyyy')
AND fulldate < to_date('11.12.2006', 'dd.mm.yyyy') ) B
where A.datum = B.datum (+)