Creating trees in oracle apex 4.0

Hi
I have to create a 3 level tree from three tables
the table structure are as follows
Customer(table:)
customerid,customer_name
Site(site)
site_id,site_name
equipments(table)
equipid,equipment_name,customerid(fk),siteid(fk)
nowi have to create a tree of the following structure
customer1
--->site1
--->equip1
---->equip2
--->site2
--->equip3
--->equip4
customer2
--->site3
--->equip5
can anyone please help to create a query to make this tree strcuture happen.
thank you
Musab

This is fairly simple - just put the tree data into a view and then access that view when you define the tree region
It would be something like the following but typically you'd add in images or links too...
create view vtree as
select to_number(null) pid, customer_id id, customer_name name from customer
union
select customer_id, site_id, site_name from site
union
select customerid, equipid, equipment_name from equipment --< note this is the same level as site, I'd imagine you'd want this to sit below customer?

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