 select  item_code,due_date, round(sum(demand),0) demand, sum(supply) supply from 
 (
 SELECT  item.item_code__plan  as item_code,independent_demand.due_date as due_date, 
          sum(case when independent_demand.quantity__std_uom is null then 0 else independent_demand.quantity__std_uom end) as demand, 
          0 as supply 
     FROM independent_demand, item 
    WHERE ( independent_demand.item_code = item.item_code ) and 
          ( independent_demand.site_code in ('@sitecode@') ) AND   
          ( item.item_code__plan = '@itemcode@') AND 
          ( independent_demand.due_date >= to_date('@fromdate@')) AND   
          ( independent_demand.due_date <= to_date('@todate@'))  and 
          ( case when independent_demand.status is null then 'C' else independent_demand.status end <> 'P') 
         Group By item.item_code__plan,independent_demand.due_date 
 UNION ALL 
         SELECT   item.item_code__plan  as item_code,sales_demand.due_date as due_date, 
         sum(case when sales_demand.quantity__std_uom is null then 0 else sales_demand.quantity__std_uom end  - case when sales_demand.consumed_qty is null then 0 else sales_demand.consumed_qty end ) as demand, 
         0 as supply 
     FROM sales_demand, item 
    WHERE ( sales_demand.item_code =  item.item_code ) and 
          ( sales_demand.site_code in ('@sitecode@') ) AND  
          ( item.item_code__plan = '@itemcode@') AND 
          ( sales_demand.due_date >= to_date('@fromdate@')) AND   
          ( sales_demand.due_date <= to_date('@todate@')) AND 
          ( 0 = @madetostock@ ) 
         Group By item.item_code__plan,sales_demand.due_date 
 UNION ALL 
   SELECT  item.item_code__plan  as item_code,distorder_det.due_date as due_date, 
          sum(case when qty_confirm is null then 0 else qty_confirm end - case when qty_shipped is null then 0 else qty_shipped end) as demand, 
          0 as supply 
     FROM distorder,distorder_det, item 
     WHERE ( distorder_det.item_code = item.item_code ) and 
           ( distorder.dist_order = distorder_det.dist_order  ) and 
          ( distorder.confirmed = 'Y'  ) and 
          ( distorder.site_code__ship in ('@sitecode@') ) AND   
          ( item.item_code__plan = '@itemcode@') AND 
          ( distorder_det.due_date <= to_date('@todate@'))   and 
          ( distorder.order_type not in (@ordtypes@) ) and 
          ( case when distorder.status is null then 'P' else distorder.status end = 'P') AND 
          ( case when qty_confirm is null then 0 else qty_confirm end - case when qty_shipped is null then 0 else qty_shipped end) > 0 
         Group By item.item_code__plan,distorder_det.due_date 
 UNION ALL 
   SELECT  item.item_code__plan  as item_code,distorder_det.due_date as due_date, 
           0 as demand, 
           sum(case when qty_confirm is null then 0 else qty_confirm end - case when qty_received is null then 0 else qty_received end ) as supply 
          FROM distorder,distorder_det, item 
      WHERE ( distorder_det.item_code = item.item_code ) and 
            ( distorder.dist_order = distorder_det.dist_order  ) and 
           ( distorder.confirmed = 'Y'  ) and 
           ( distorder.site_code__dlv in ('@sitecode@') ) AND 
          ( item.item_code__plan = '@itemcode@') AND 
           ( distorder_det.due_date <= to_date('@todate@')) and 
           ( distorder.order_type not in (@ordtypes@) ) and 
           ( case when distorder.status is null then 'P' else distorder.status end = 'P')   AND 
           (case when qty_confirm is null then 0 else qty_confirm end - case when qty_received is null then 0 else qty_received end ) > 0 
          Group By item.item_code__plan,distorder_det.due_date 
  UNION ALL 

   SELECT   item.item_code__plan  as item_code,porddet.dlv_date as due_date, 
           0 as demand , 
           sum(case when (case when porddet.quantity__stduom is null then 0 else porddet.quantity__stduom end - case when porddet.dlv_qty is null then 0 else porddet.dlv_qty end) < 0 then 0 else case when porddet.quantity__stduom is null then 0 else porddet.quantity__stduom end - case when porddet.dlv_qty is null then 0 else porddet.dlv_qty end end  ) as supply   
      FROM porddet,porder, item 
     WHERE (  porddet.item_code = item.item_code ) and 
        (porddet.purc_order = porder.purc_order ) and  
        (porder.confirmed = 'Y') and 
        (porder.status not in('C','X')) and 
        (porddet.status not in('C','X')) and 
        (porddet.site_code in ('@sitecode@') ) AND 
          ( item.item_code__plan = '@itemcode@') AND 
        (  porder.pord_type not in (@ordtypes@) ) and 
        (  porddet.dlv_date         <= to_date('@todate@'))   
         Group By item.item_code__plan,porddet.dlv_date 
 UNION ALL 
         SELECT  item.item_code__plan  as item_code,FN_MRP_DUEDATE(to_date('@fromdate@')) as due_date, 
         0 as demand , 
         DDF_INV_CLSTK_MRP('@sitecode@',item.item_code,to_date(fn_sysdate())) as supply  
         FROM  item 
         WHERE  item.item_code__plan= '@itemcode@' 
         and   DDF_INV_CLSTK_MRP('@sitecode@',item.item_code,to_date(fn_sysdate())) > 0 
  )  
 group by item_code,due_date 
 having sum(demand) <> 0 or sum(supply) <> 0