Debería poder eliminar la mayoría de los elementos primarios de agrupación...
select *
from
(select 'Source1' Source from Dual
union select 'Source2' from Dual
union select 'Source3' from Dual
union select 'Source4' from Dual
) s
cross join (
select 'O' Status from Dual
union select 'C' from Dual
) x
cross join (
SELECT
TO_DATE('09/30/2013','mm/dd/yyyy') - 1 + LEVEL dt
FROM dual
CONNECT BY
LEVEL <= ( TO_DATE('10/05/2013','mm/dd/yyyy')
- TO_DATE('09/30/2013','mm/dd/yyyy')) + 1
) d
left join
myTable y
on y.err_sts_cd = x.Status