Need help in query to have all items in sap with PO data on order, date

Question

Hello Everyone,
I need some help in writing a query to show all items in sap db to have itemcode, itemname, onhand, sellable(onhand-committed), on order, and the delivery date when that time should be received.  I need to know what items are regular items, which ones are master and components.  For the master I need to have the deliver date of the PO for the component.
I have written this.
SELECT DISTINCT TOP (100) PERCENT T1.ItemCode, SUM(T1.Sellable) AS Sellable, T1.OnOrder, MAX(T1.Docduedate) AS DeliveryDate, T1.WhsCode
FROM         (SELECT     ItemCode, Sellable, OnOrder, '1/1/1900' AS Docduedate, WhsCode
                       FROM          dbo.V_RAZ_StoreInv
                       UNION ALL
                       SELECT     TOP (100) PERCENT ItemCode, '0' AS Sellable, Quantity AS Onorder, DocDueDate, WhsCode
                       FROM         dbo.V_RAZ_OPENPOSDATA
                       ORDER BY ItemCode) AS T1 LEFT OUTER JOIN
                      dbo.V_RAZ_ItemInfo ON T1.ItemCode = dbo.V_RAZ_ItemInfo.ItemCode
GROUP BY T1.ItemCode, T1.OnOrder, T1.WhsCode, dbo.V_RAZ_ItemInfo.OnHold
HAVING      (dbo.V_RAZ_ItemInfo.OnHold = 'n')
ORDER BY T1.ItemCode, T1.WhsCode
and for the v_raz_openposdata I have the following query
SELECT     dbo.OPOR.DocNum, dbo.OPOR.DocStatus, dbo.POR1.WhsCode, dbo.POR1.ItemCode, dbo.POR1.Dscription, dbo.POR1.Quantity, dbo.POR1.OpenQty,
                      dbo.POR1.LineStatus, dbo.OPOR.DocDueDate
FROM         dbo.OPOR LEFT OUTER JOIN
                      dbo.POR1 ON dbo.OPOR.DocEntry = dbo.POR1.DocEntry
WHERE     (dbo.OPOR.DocStatus = 'O')
Any help is greatly appreciated. 
Right now I do get the delivery date for regular items and components but the master sku for the component all of them have 1/1/1900. 
Thank you

Answer 1

Thank you for replying Gordon.  I did not remember I had asked this before.  I no longer have access to the other account. 
What I need on the query is that I want  a list of items with the on order quantity and when we are expecting this order to be received.  The receiving date is based on the PO delivery date.  The trick here is that  I need to Master sku to show the delivery date of the component sku.  In my scenario all components have the same delivery date for the Master sku.  If there are mulitple delivery dates because each warehouse is getting them on a different date then I want to get the delivery date for that warehouse.
Let me know if this is possible and if yes please guide towards a query for it.
Thank you.