Need a few hints for graph component Stacked bar

Hi to all,
JDeveloper11gR2
i need a little step by step tutorial to create a stacked bar graph component to answer the following questions.
which data table structure i need?
which data structure i need? horizontal (columns stacking) or vertical (rows stacking)
Will i need the hierarchical graph option in the creation wizard?
I think the documentation unattended a litte bit the useful stacked graph component.
Thank you very much.
Best regards
Gunnar
Edited by: gkieck on Dec 14, 2012 12:06 AM

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