Outer join doesn't retrieve the correct values

Question

Hi, I have a problem to retrieve some data from this query with the outer join:
select count(incident_id),range_2 from
(select range_2 from apps.aaa_table) a,
(Select inc.incident_id,
XXN2B_RESOLUTION_RANGE(2,ROUND(( (TO_DATE(inc.INCIDENT_ATTRIBUTE_7,'dd/mm/yyyy hh24:mi:ss')-inc.INC_RESPONDED_BY_DATE)*24 ),2)) RANGES
,inc.CATEGORY_ID
, inc.INVENTORY_ITEM_ID,
prom_dt.Iptv_Sumptom --S?µpt?µa
FROM cs_incidents_all_b inc,
cs_incidents_all_tl tl,
cs_sr_type_mapping m,
fnd_responsibility resp,
xxntt.xxntt_incidents_support ntt,
xxntt.xxntt_incidents ntt_inc,
xxe.xxe_tt_promitheas_dt prom_dt,
xxe.Xxe_Cs_Int_Sla sla
WHERE inc.incident_id = tl.incident_id
AND tl.LANGUAGE = 'EL'
AND inc.incident_type_id = m.incident_type_id
AND resp.responsibility_key IN (select SV.FLEX_VALUE from fnd_flex_value_sets s, FND_FLEX_VALUES SV
where s.FLEX_VALUE_SET_NAME = 'XXNTT_RESPONSIBILITIES'
AND S.FLEX_VALUE_SET_ID = SV.FLEX_VALUE_SET_ID)
AND m.responsibility_id = resp.responsibility_id
AND resp.end_date is null
AND inc.incident_number = ntt.incident_number(+)
AND inc.incident_number = ntt_inc.incident_number(+)
AND inc.incident_id = prom_dt.incident_id(+)
AND inc.incident_number = sla.Incident_Number(+)
--and TOTAL_INACT_SLA_DURATION  not like '%0:00%'
and (inc.INC_RESPONDED_BY_DATE is not null AND INCIDENT_ATTRIBUTE_7 is not null)
) b,
(select * from xxntt_custom_hierarchy
union
select null eidos, null omada, null product_categiory, null category_id, null inv_item_descripiption, null symptom, null tautopoihsh, null inv_item_id from dual
) c
where a.range_2 = b.ranges (+)
and c.INV_ITEM_ID (+) = b.INVENTORY_ITEM_ID
and c.CATEGORY_ID (+) = b.CATEGORY_ID
and c.SYMPTOM (+) = b.IPTV_SUMPTOM
and c.OMADA = 'A'
group by range_2
This query is composed by 3 dataset: a, b, and c
the dataset a is a fixed list of values (LOV): range_2 = '0-2h','2-4h','4-6h','6-8h','8-10h','10-12h','12-14h','14-16h','16-18h','18-20h'
the dataset b retrieve the list of the incident_id's and their related ranges (calculated with the function XXN2B_RESOLUTION_RANGE)
the dataset c is just a filter on the the dataset b to retrieve only the incident_id's who belong to the Group 'A'
Want I want to achieve is this: see always the complete list of values 'range_2' even if I don't have incident_id with a particular range.
For this reason I put the condition: a.range_2 = b.ranges (+)
....but this doesn't work....I see ONLY the incident_id which have the range inside the LOV......instead I want to see also if there are incident_id without a range in the LOV.
Grouping by range_2, I see:
!http://www.freeimagehosting.net/uploads/d900035c11.jpg!
instead of
!http://www.freeimagehosting.net/uploads/99a75dfca4.jpg!
Anybody can help me to understand where is the mistake ???
Thanks in advance
Alex

Answer 1

Hi, Alex,
Whenever you ask a question, post a little sample data (CREATE TABLE and INSERT statements) for all the tables (relevant columns only), as well as the results you want from that data.
When you post formatted text on this site (and code should always be formatted) type these 6 characters:
{code}
(small letters only, inside curly brackets) before and after sections of formatted text, to preserve spacing.
If you're using a + sign next to some column from table c, then all conditions involving table c need to have a + sign; otherwise, you cancel the effect of the outer join.
Change
and     c.OMADA      = 'A'to
and     c.OMADA (+)  = 'A'That may be all you need. If not, post the sample data and your formatted query.