Help with supply and demand query using monthly buckets

I'm working on a query bound for Discoverer which pulls the aggregated supply and demand for an item and buckets it into months. So for any given item, I need to show the item, onhand, cost, aggregated supply (planned orders, requisitions, pos), and aggregated demand (planned order demand, jobs) - all bucketed by months.
The code below works okay to find all of the data for July, but I also need to show August and September. I'm thinking I could use a union but am reluctant because the query already runs kind of slow and I'm not sure if I'm on the right track.
Database Server
RDBMS : 10.2.0.3.0
Oracle Applications : 11.5.9
-Tracy
select
      item.inventory_item_id, item.organization_code, item.item, item.description
    , item.make_buy,item.planner_code
    , planned.compile_designator, planned.order_type_text, sum(planned.quantity_rate)planned_total
    , planned.mrp_sugg_due_month
    , sum(job.required_quantity-job.quantity_issued)job_open, job.required_month
    , onhand.total_qoh
    , purchase.item_revision prev, purchase.promised_month, purchase.ship_to_organization_id
    , sum((purchase.quantity-purchase.quantity_cancelled)-purchase.quantity_received)po_open
    , req.item_revision rrev, req.destination_organization_id, req.org_id, req.need_by_month
    , sum((req.quantity-req.quantity_cancelled)-req.quantity_delivered)req_open
    , cost.item_cost,cost.cost
from
--item--
(select mtl.inventory_item_id, mtl.segment1 item,mtl.description,decode(mtl.planning_make_buy_code,1,'Make',2,'Buy') make_buy
        ,mtl.organization_id, mtp.organization_code, mtl.planner_code
       ,to_char(add_months(sysdate,+1),'YYYY_MM')month1, to_char(add_months(sysdate,+2),'YYYY_MM')month2
       ,to_char(add_months(sysdate,+3),'YYYY_MM')month3
from    inv.mtl_system_items_b mtl, inv.mtl_parameters mtp
where    mtl.organization_id = mtp.organization_id
)item,
--planned orders - 3 months --
(select compile_designator,organization_id,inventory_item_id,order_type_text,nvl(quantity_rate,0)quantity_rate,new_due_date
       ,to_char(trunc(new_due_date,'MM'),'YYYY_MM')mrp_sugg_due_month
from   apps.mrp_orders_sc_v
where order_type_text in ('Planned order','Planned order demand')
and    to_char(trunc(new_due_date,'MM'),'YYYY_MM') <= to_char(add_months(:Month,+2),'YYYY_MM')
and    to_char(trunc(new_due_date,'MM'),'YYYY_MM') >= to_char(:Month,'YYYY_MM')
)planned,
--jobs - 3 months--
(select organization_id,wip_entity_name job, inventory_item_id,concatenated_segments,nvl(required_quantity,0)required_quantity
        ,nvl(quantity_issued,0)quantity_issued, date_required,to_char(trunc(date_required,'MM'),'YYYY_MM') required_month
        ,wip_entity_id,creation_date, wip_job_status
from    apps.wip_requirement_ops_inq_v
where   primary_item_id <>inventory_item_id
and     wip_job_status not in ('Closed','Cancelled','Complete')
and     to_char(trunc(date_required,'MM'),'YYYY_MM') <= to_char(add_months(:Month,+2),'YYYY_MM')
and     to_char(trunc(date_required,'MM'),'YYYY_MM') >= to_char(:Month,'YYYY_MM')
)job,
--qty onhand--
(select inventory_item_id,organization_id,sum(nvl(transaction_quantity,0))total_qoh
from     inv.mtl_onhand_quantities_detail
group by inventory_item_id, organization_id
)onhand,
-- po - 3 months--
(select pol.item_id, pol.item_revision, nvl(pll.quantity,0)quantity, nvl(pll.quantity_received,0)quantity_received
      , nvl(pll.quantity_rejected,0),nvl(pll.quantity_cancelled,0)quantity_cancelled,poh.segment1 po_num
       ,pll.promised_date, to_char(trunc(pll.promised_date,'MM'),'YYYY_MM')promised_month
       ,pll.shipment_num,pll.ship_to_organization_id
from   po.po_lines_all pol, po.po_headers_all poh, po.po_line_locations_all pll
where poh.po_header_id = pol.po_header_id
and    pol.po_header_id = pll.po_header_id
and    pol.po_line_id = pll.po_line_id
and    pol.cancel_flag != 'Y'
and    pol.item_id is not null
and    to_char(trunc(pll.promised_date,'MM'),'YYYY_MM')<= to_char(add_months(:Month,+2),'YYYY_MM')
and    to_char(trunc(pll.promised_date,'MM'),'YYYY_MM')>= to_char(:Month,'YYYY_MM')
)purchase,
--reqs - 3 months--
(select prh.segment1 req_number,nvl(prl.quantity,0)quantity,nvl(prl.quantity_delivered,0)quantity_delivered
       ,nvl(prl.quantity_cancelled,0)quantity_cancelled
       ,prl.destination_organization_id,prl.org_id,prl.item_id,prl.item_revision,prl.need_by_date
       ,to_char(trunc(prl.need_by_date,'MM'),'YYYY_MM')need_by_month
from   po.po_requisition_headers_all prh, po.po_requisition_lines_all prl
where prh.requisition_header_id = prl.requisition_header_id(+)
and    nvl(prl.cancel_flag,'N') !='Y'
and    prh.authorization_status != 'CANCELLED'
and    to_char(trunc(prl.need_by_date,'MM'),'YYYY_MM') <= to_char(add_months(:Month,+2),'YYYY_MM')
and    to_char(trunc(prl.need_by_date,'MM'),'YYYY_MM') >= to_char(:Month,'YYYY_MM')
)req,
--cost--
(select msib.inventory_item_id,msib.organization_id,cqm.material_cost,cic.item_cost
,(case when cqm.material_cost=0 then cic.item_cost else cqm.material_cost end) cost, cqm.cost_group_id
from inv.mtl_system_items_b msib
     ,(select cql.cost_group_id,cql.inventory_item_id,cql.organization_id,cql.layer_quantity,cql.material_cost,mp.organization_code
         from bom.cst_quantity_layers cql, inv.mtl_parameters mp
        where mp.default_cost_group_id = cql.cost_group_id) cqm
    ,bom.cst_item_costs cic
where msib.inventory_item_id = cqm.inventory_item_id(+)
and msib.organization_id = cqm.organization_id(+)
and msib.inventory_item_id = cic.inventory_item_id(+)
and msib.organization_id = cic.organization_id(+)
)cost
where item.inventory_item_id = job.inventory_item_id(+)
and   item.organization_id = job.organization_id(+)
and   item.month1 = job.required_month(+) -- 2009_07 --
and   item.inventory_item_id = onhand.inventory_item_id(+)
and   item.organization_id = onhand.organization_id(+)
and   item.inventory_item_id = purchase.item_id(+)
and   item.month1 = purchase.promised_month(+) -- 2009_07 --
and   item.inventory_item_id = req.item_id(+)
and   item.month1 = req.need_by_month(+) -- 2009_07 --
and   item.inventory_item_id = cost.inventory_item_id(+)
and   item.organization_id = cost.organization_id(+)
and   item.inventory_item_id = planned.inventory_item_id(+)
and   item.organization_id = planned.organization_id(+)
and   item.month1 = planned.mrp_sugg_due_month(+) -- 2009_07 --
and   item.make_buy = 'Buy'
and   item.item in ('161309040','744L755','150-GFM') --test items --
group by item.inventory_item_id,item.organization_code,item.item,item.description,item.make_buy,item.planner_code
      ,job.required_month ,onhand.total_qoh , purchase.item_revision, purchase.promised_month
        ,purchase.ship_to_organization_id ,cost.item_cost,cost.cost
       ,req.item_revision, req.destination_organization_id,req.org_id,req.need_by_month
       ,planned.compile_designator,planned.order_type_text,planned.mrp_sugg_due_month
order by item.organization_code,item.item

Hi,
Six things:
(1) Where are the one-to-many relationships between your tables? If a single row in mtl can match two (or more) rows in mrp, and can also match two (or more) rows in wip, then it looks like, when you join both of them them, you'll have a chasm trap, that is, you'll get all the matching rows from mrp paired with all matching rows from wip. Are you sure your existing query is producing the right results?
Are there one-to-many relationships with the other tables in your original query?
(2) Are your DATEs always at midnight? If not, avoid using BETWEEN and LAST_DAY for DATE comparisons: otherwise you'll miss everything between 00:00:01 and 23:59:59 on the last day.
That is, instead of
and     mrp.new_due_date(+) BETWEEN :Month AND LAST_DAY(ADD_MONTHS(:Month,2))ypou should say
and       mrp.new_due_date (+)     >= :Month
and       mrp.new_due_date (+)     < ADD_MONTHS (:Month, 3)(3) The basic way to pivot the months of mrp_due_date is:
SELECT    ...
,       NVL ( SUM ( CASE
                 WHEN mrp.new_due_date >= :month
                 AND   mrp.new_due_date < ADD_MONTHS (:month, 1)
                 THEN mrp.quantity_rate
                END
           , 0
           )          AS mrp_qty_0
,       NVL ( SUM ( CASE
                 WHEN mrp.new_due_date >= ADD_MONTHS (:month, 1)
                 AND   mrp.new_due_date < ADD_MONTHS (:month, 2)
                 THEN mrp.quantity_rate
                END
           , 0
           )          AS mrp_qty_1When you do this, do not GROUP BY TRUNC (mrp.new_due_date, 'MM').
The code above does two months: I'm sure you get the idea for how to do more.
To get dynamic column headings (such as Jun_2009 or "2009-06" instead of the generic mrp_qty_o) requires dynamic SQL. The best way to do dynamic SQL depends on the tool that is producing the query (e.g. SQL*Plus). What are you using? Are you willing to change, if it helps?
(4) Displaying separate columns from one row as a single column on multiple rows is called unpivoting. How badly do you want to do that? Your query would be simpler and faster if the output had only one row per group (rather than one row for mrp_qty and another row for wip_wty). That one row could have six columns (e.q. June_mrp, June_wip, July_mrp, July_wip, August_mrp and August_wip) instead of three. Depending on your front-end tool, you might even be able to wrap the single row of output so that it always appeared as two rows, each with three columns.
(5) Sorry I told you to do
and     mrp.order_type_text(+) in (...)I never use the + outer-join notation any more, so I forgot about the ORA-01719 error. There's no problem having an outer-join condition like that using ANSI notation. (One more reason to switch.)
(6) As you noticed, this site doesn't like to print the <> inequality operator, even inside tags.
Use the equivalent != operator instead, when posting on this site.

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      structure_name = vs_tabname
      is_multiple = abap_true ).
The result is the same...is there any way to let the ALV know what search helps it has to use, and doesn't force me to manually build a VALUE_SET to be bound on the single attributes? There are many tables, with many fields, and maintaining this solution would be very costly.

I have checked with method GET_ATTRIBUTE_VALUEHELP_TYPE of interface IF_WD_CONTEXT_NODE_INFO, on an attribute which i know to have a search help (Foreign key of a check table).
The method returns 'N', that is the constant IF_WD_VALUE_HELP_HANDLER~CO_VH_TYPE_NO_HELP. So, the framework was not able to find a suitable search help.
Using method GET_ATTRIBUTE_VALUE_HELP of the same interface, on the same attribute, returns me '111', which is constant C_VALUE_HELP_MODE-AUTOMATIC.
Therefore, the WD framework knows it has to automatically detect a value help, but fails to find one.
Also, this means in my opinion that the ALV and the dynamic external mapping are not the culprits: since node creation, no help is detected for any attribute but the date. Honestly, I don't have a clue on what's happening.

A problem with LOV and my query. Help to solve, please...

Hello!
Here is a query:
SELECT FULLNAME||', '||(SELECT NAMEOFGROUP||', '||(SELECT CITY FROM CITY WHERE PRKEY=TLL.CITY) FROM GROUPS TLL WHERE PRKEY=TL.GROUPOF) t ,PRKEY r FROM MINEUSERS TL
In SQL DEVELOPER it works fine. But in APEX - when I try to save my "SELECT LIST" - it falls with error - "If your query contains an in-line query, the first FROM clause in the SQL statement must not belong to the in-line query."
How can I reassemble my query to fix this problem - I have no idea... :(
Thanks

You may create a pipelined function returning two values, display and return, to return
the result from your query. After that, your LOV should work. See example here:
http://htmldb.oracle.com/pls/otn/f?p=31517:146
Denes Kubicek
http://deneskubicek.blogspot.com/
http://htmldb.oracle.com/pls/otn/f?p=31517:1
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