ORACLE MINUS usage

Question

Is it possible to use MINUS when a count appears in a query qith a group by clause.
I am running the following query and it always gives the result of only the first query (which appears before the minus) it doesnt give the minus effect.
isnt this possible...
SELECT con.agent_code,a.name, PKG.PACKAGE_CODE,count(con.image_id)
FROM PM_PACKAGE PKG, sm_cam_image_detail_bulk CON,cam_agent a
WHERE (CON.PACKAGE_CODE = PKG.PACKAGE_CODE)
AND a.agent_code=con.agent_code
AND a.AG_TY_AGENT_TYPE= 'DEAL'
AND (A.agent_CODE = 'PHONE')
AND (PKG.PRE_POST_code = 'POSTPAID')
AND TO_DATE(TO_CHAR(profile_created_date,'DD/MM/YYYY'),'DD/MM/YYYY') BETWEEN TO_DATE('01/08/2006','DD/MM/YYYY') AND TO_DATE('31/08/2006','DD/MM/YYYY')
group by con.agent_code,a.name, PKG.PACKAGE_CODE
MINUS
SELECT con.agent_code,a.name, PKG.PACKAGE_CODE,count(con.image_id)
FROM PM_PACKAGE PKG, sm_cam_image_detail_bulk CON,cam_agent a, dr_registration dr
WHERE con.package_code = PKG.package_code
AND a.agent_code= con.agent_code
AND con.mobile_no = dr.mobile_no
AND con.agent_type = 'DEAL'
AND (con.agent_CODE = 'PHONE')
AND dr.package_code not like 'I_%'
AND TO_DATE(TO_CHAR(con.start_date,'DD/MM/YYYY'),'DD/MM/YYYY') = TO_DATE('01/08/2006','DD/MM/YYYY')
AND TO_DATE(TO_CHAR(con.end_date,'DD/MM/YYYY'),'DD/MM/YYYY') = TO_DATE('31/08/2006','DD/MM/YYYY')          
group by con.agent_code,a.name, PKG.PACKAGE_CODE
order by agent_code,name,PACKAGE_CODE

Answer 1

Try the follwing code (not tested):
select query_1.agent_code,
       query_1.name,
       query_1.package_code,
       cnt_query_1 - cnt_query_2 difference
from
( select con.agent_code,a.name, pkg.package_code,count(con.image_id) cnt_query_1
   from pm_package pkg, sm_cam_image_detail_bulk con,cam_agent a
   where (con.package_code = pkg.package_code)
   and a.agent_code=con.agent_code
   and a.ag_ty_agent_type= 'DEAL'
   and (a.agent_code = 'PHONE')
   and (pkg.pre_post_code = 'POSTPAID')
   AND profile_created_date between to_date('01/08/2006','DD/MM/YYYY') and to_date('31/08/2006','DD/MM/YYYY')
   group by con.agent_code,a.name, pkg.package_code
) query_1,
   select con.agent_code,a.name, pkg.package_code,count(con.image_id) cnt_query_2
   from pm_package pkg, sm_cam_image_detail_bulk con,cam_agent a, dr_registration dr
   where con.package_code = pkg.package_code
   and a.agent_code= con.agent_code
   and con.mobile_no = dr.mobile_no
   and con.agent_type = 'DEAL'
   and (con.agent_code = 'PHONE')
   and dr.package_code not like 'I_%'
   and con.start_date = to_date('01/08/2006','DD/MM/YYYY')
   and con.end_date = to_date('31/08/2006','DD/MM/YYYY')
   group by con.agent_code,a.name, pkg.package_code
   order by agent_code,name,package_code
) query_2
where query_1.agent_code = query_2.agent_code
and   query_1.name = query_2.name
and   query_1.package_code = query_2.package_code
;