Crystal Reports RE:Displaying null value in report

Message

   HI All,

IAm using crystal2008 
I have a sql code in which some columns are null but there is value 0 in the column count..which is not displayed in the report.i tried all ways but couldn't figure out solution for this.

   If you look at the code in the second half when i use 0 = then it displays in toad as well as in report also..but when there is data..it displays both the data and the 0. I want to display data when there is data..or 0.

SELECT COUNT,

counttype,

siteid,

storeloc
FROM ( SELECT COUNT ( * ) AS COUNT,

'NRRETURNNULLWO' counttype,

siteid,

storeloc
FROM maximo.matusetrans

WHERE matusetrans.issuetype = 'RETURN'

AND matusetrans.refwo IS NULL

AND matusetrans.transdate >= TO_DATE (:startdate)

AND matusetrans.transdate <= SYSDATE

GROUP BY siteid, storeloc)

UNION

(SELECT 0 COUNT,

'NRRETURNNULLWO' counttype,

'siteid' AS siteid,

'storeloc' as storeloc

FROM DUAL

WHERE 0= ( SELECT COUNT ( * ) AS COUNT

FROM maximo.matusetrans

WHERE matusetrans.issuetype = 'RETURN'

AND matusetrans.refwo IS NULL

AND matusetrans.transdate >= TO_DATE (:startdate)

AND matusetrans.transdate <= SYSDATE) ) 

Thanks
Swapna