Using Hirarical Tree To Display Data

hi
markger helps me alot in this question
http://www.experts-exchange.com/questions/28687901/Error-Writing-On-A-Non-Database-Form.html#a40823228
and i'm going to accept his answers
but before of that , i would like to get experts opinion about the following scenario
i have table for sales transactions consist of :
unit  number
catigory  number
sub_catigory number
item number
dob date
qty number
unit_price number
i would think to have data_block and display summary of sales like this scenario
using hirarecal tree to display units for each main node , and sales summary amount related to each node
then if user expand the node of any unit , it will display another levels of tree displaying catigories and sales amount for each catigory
then expand catigory to view sub_catigory & sales amount
then expand sub_catigory to view items and sales amount ,, etc
is it possible in oracle forms ?
NiceMan331Asked:
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Mark GeerlingsDatabase AdministratorCommented:
Yes, Oracle Forms6i (and likely all later version of Oracle Forms) can support a "Hierachical Tree" object.  Are these a good idea to use in Oracle Forms?  Maybe, but maybe not.   Are they easy to design and use in Oracle Forms?  I would say no.  Are they the easiest way to display what you want to display in Oracle Forms.  In my opinion, no.  But, I admit, I never tried to develop a "Hierachical Tree" object in an Oracle Form.  I did have to use one that one of our developers created, and as a user of that form, I found it frustrating to work with.  Maybe that is just my experience.  Maybe other Oracle Forms developers and users like them.  I prefer the flexibility of queries that "normal" Oracle Forms database blocks support.
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