Hierarchical Query question (2)

Question

--Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - 64bit Production
I am trying to join two hierarchies together. The first is Center and each parent Center until the top. The second is Attribute, for each bottom level Center, and it all the way up. Both hierarchies are in the same TABLE. A Center is an Attribute if in the ParentAttribId COLUMN (conversely, the id COLUMN in that TABLE can only be Centers.) Ultimately, the data will be listed record by record, with all the parents as COLUMNs.
The Center hierarchy query works. The parent records-to-column effort will be done later, i don't care about that right now. What i am struggling with is how to join to get the Center's id listed in the Attribute hierarchy. The query fragment (in the second CTE) tries to retrieve Center.Id, which is not in scope, as it is only included in the START WITH clause. But how do i include it in the FROM clause (to bring it in scope) when it has nothing to do with the hierarchy (other than the starting point).
<PRE>
WITH
Center_List_Hierarchy
AS
SELECT
          -- 4) List by each Center's hierarchy, the level and id.
          -- Note: By definition, CONNECT_BY_ROOT ModelId == ModelId == :Model.
          -- ModelId returned so as not to use :Model (in outer query).
          CONNECT_BY_ROOT Id     Center_Root,
          LEVEL               Center_Level,
          ModelId               Model,
          Id
FROM
          ADMINEPO.PP_Respcenter
     CONNECT BY
          -- 3) For each Center, go to (and include) the top, identified by Id = ParentId.
          ModelId      = PRIOR ModelId
     AND     Id          = PRIOR ParentId
     AND     PRIOR Id     &lt;&gt; PRIOR ParentId
     START WITH
          (ModelId, Id)     IN
                    SELECT
                         Attribute.ModelId,
                         Attribute.Id
                    FROM
                         ADMINEPO.PP_Respcenter_Name     Center_Name,
                         ADMINEPO.PP_AT_RespCenter     Attribute
                    WHERE
                         -- 1) For this Model, find the id of the list attribute.
                         Center_Name.ModelId      = :Model
                    AND     Center_Name.LangId     = :Name_Type_Default
                    AND     UPPER(Center_Name.NAME)      = 'CENTER LIST'
                         -- 2) Get all Centers associated with the attribute.
                    AND     Attribute.ModelId = Center_Name.ModelId
                    AND     Attribute.ParentAttribId = Center_Name.Id
     Attribute_Hierarchy
AS
     SELECT
          -- 4) For this center, get each Attribute with its hierarchy.
          Center.Id          Center,
          CONNECT_BY_ROOT     Id     Attribute_Root,
          LEVEL               Attribute_Level,
          ModelId               Model,
          Id
FROM
          ADMINEPO.PP_Respcenter
     CONNECT BY
          -- 3) For each Attribute, go to (and include) the top, identified by Id = ParentId.
          ModelId      = PRIOR ModelId
     AND     Id          = PRIOR ParentId
     AND     PRIOR Id     &lt;&gt; PRIOR ParentId
     START WITH
          (ModelId, Id)     IN
                    SELECT
                         Attribute.ModelId,
                         Attribute.ParentAttribId
                    FROM
                         Center_List_Hierarchy          Center,
                         ADMINEPO.PP_AT_RespCenter     Attribute
                    WHERE
                         -- 1) Limit to bottom level Centers.
                         Center.Center_Level     = 1
                         -- 2) Get its attributes.
                    AND     Attribute.ModelId     = Center.Model
                    AND     Attribute.Id          = Center.Id
</PRE>

Answer 1

Hi,
Sorry, I don't udnerstand.
Whenever you have a problem, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all tables, and also post the results you want from that data.
Explain, using specific examples, how you get those results from that data.
If you can show your probelm using commonly available tables, such as scott.emp or hr.employees (both of which contain hierarcies) then you don't have to post any sample data; just the results and the explanation.
Brian Tkatch wrote:
... What i am struggling with is how to join to get the Center's id listed in the Attribute hierarchy. The query fragment (in the second CTE) tries to retrieve Center.Id, which is not in scope, as it is only included in the START WITH clause. Isn't that Attribute_Root, below?
<PRE>
...     Attribute_Hierarchy
AS
     SELECT
          -- 4) For this center, get each Attribute with its hierarchy.
          Center.Id          Center,
          CONNECT_BY_ROOT     Id     Attribute_Root,
          LEVEL               Attribute_Level,
          ModelId               Model,
          Id
FROM ...
</PRE>