Cartesian Product from in-line queries

Question

I have the following query:
SELECT AUDIT_MONTH, AUDITS, DEFECTS
FROM
select distinct(to_char(AUDIT_DATE,'MM/YY')) as AUDIT_MONTH
from v_safety_audit_records
select count(distinct(AUDIT_ID)) AUDITS
from v_safety_audit_records
group by to_char(AUDIT_DATE,'MM/YY')
select count(KEY_ID) DEFECTS
from v_safety_audit_records
where SUBAREA_ID NOT LIKE '_98'
and SUBAREA_ID NOT LIKE '_99'
group by to_char(AUDIT_DATE,'MM/YY')
but it keeps giving me a cartesian product. Is there a way to re-write this so that I only get the month, the number of audits, and number of defects on a line rather than number of months x number of months worth of lines? I can't seem to get the join conditions worked out... I can re-write this all using views, but as it is for a single report, I'd rather not bother with more views if I can avoid it.
Thanks in advance.

Answer 1

The problem is that the query doesn't return a single row and isn't meant to. I tried:
SELECT
select distinct(to_char(AUDIT_DATE,'MM/YY'))
from v_safety_audit_records
group by to_char(AUDIT_DATE,'MM/YY')
) AUDIT_MONTH,
select count(distinct(AUDIT_ID))
from v_safety_audit_records
group by to_char(AUDIT_DATE,'MM/YY')
) AUDITS,
select count(KEY_ID)
from v_safety_audit_records
where SUBAREA_ID NOT LIKE '_98'
and SUBAREA_ID NOT LIKE '_99'
group by to_char(AUDIT_DATE,'MM/YY')
) DEFECTS
FROM DUAL;
and got "ORA-01427: single-row subquery returns more than one row". It would be a good idea if I only needed it for one month, however.