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Parent Query Reference Column in Subquery (Oracle)

How can I reference a column outside of a subquery using Oracle? I need to use it in a WHERE statement to subquery.

I basically have this:

SELECT Item.ItemNo, Item.Group
FROM Item
  LEFT OUTER JOIN (SELECT Attribute.Group, COUNT(1) CT 
                   FROM Attribute 
                   WHERE Attribute.ItemNo=12345) A ON A.Group = Item.Group
WHERE Item.ItemNo=12345

I would like to change WHERE Attribute.ItemNo=12345to WHERE Attribute.ItemNo=Item.ItemNoin the subquery, but I cannot figure out if this is possible. I keep getting "ORA-00904:" Item "." ItemNo ": Invalid Identifier"

EDIT:

Ok, this is why I need a structure like this:

I want to be able to count the Error record (where the element is missing a value) and the OK record (where the element has a value).

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:

create table itemcountry(
  itemno number,
  country nchar(3),
  imgroup varchar2(10),
  imtariff varchar2(20),
  exgroup varchar2(10),
  extariff varchar2(20) );

create table itemattribute(
  attributeid varchar2(10),
  tariffgroup varchar2(10),
  tariffno varchar2(10) );

create table icav(
  itemno number,
  attributeid varchar2(10),
  value varchar2(10) );

:

select itemno, country, imgroup, imtariff, im.error "imerror", im.ok "imok", exgroup, extariff, ex.error "exerror", ex.ok "exok"
from itemcountry
  left outer join (select sum(case when icav.itemno is null then 1 else 0 end) error, sum(case when icav.itemno is not null then 1 else 0 end) ok, tariffgroup, tariffno
                   from itemattribute ia 
                     left outer join icav on ia.attributeid=icav.attributeid 
                   where (icav.itemno=12345 or icav.itemno is null) 
                   group by tariffgroup, tariffno) im on im.tariffgroup=imgroup and imtariff=im.tariffno
  left outer join (select sum(case when icav.itemno is null then 1 else 0 end) error, sum(case when icav.itemno is not null then 1 else 0 end) ok, tariffgroup, tariffno
                   from itemattribute ia 
                     left outer join icav on ia.attributeid=icav.attributeid 
                   where (icav.itemno=12345 or icav.itemno is null) 
                   group by tariffgroup, tariffno) ex on ex.tariffgroup=exgroup and extariff=ex.tariffno
where itemno=12345;

SQL Fiddle.

+5
2

, . . .

select i.itemno, i.group
  from item i
  left outer join ( select group, itemno
                      from attribute b
                     group by group itemno ) a
    on a.group = i.group 
   and i.itemno = a.itemno
 where i.itemno = 12345

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count(1) group by, group by , .

, , , , ,

select itemno, group
  from item
 where itemno = 12345

analytic function. - count(*) over ( partition by group).

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with sub_query as (
 select count(*) - count(icav.itemno) as error
      , count(icav.itemno) as ok
      , min(itemno) over () as itemno
      , tariffgroup
      , tariffno
   from itemattribute ia 
   left outer join icav 
     on ia.attributeid = icav.attributeid 
  group by icav.itemno
         , tariffgroup
         , tariffno
  ) 
    select ic.itemno, ic.country, ic.imgroup, ic.imtariff
         , sum(im.error) as "imerror", sum(im.ok) as "imok"
         , ic.exgroup, ic.extariff
         , sum(ex.error) as "exerror", sum(ex.ok) as "exok"
      from itemcountry ic
      left outer join sub_query im 
        on ic.imgroup = im.tariffgroup
       and ic.imtariff = im.tariffno
       and ic.itemno = im.itemno
      left outer join sub_query ex 
        on ic.exgroup = ex.tariffgroup
       and ic.extariff = ex.tariffno
       and ic.itemno = ex.itemno
     where ic.itemno = 12345
     group by ic.itemno, ic.country
            , ic.imgroup, ic.imtariff
            , ic.exgroup, ic.extariff
           ;
0

WHERE attribute.itemno = item.itemno. , .

-4

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