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I am trying to query oracle database from Salesforce1 or Force.com platform and diplay the result in a tab i created in my org

I am trying to query oracle database from Salesforce1 or Force.com platform and diplay the result in a tab i created in my org

My Product has REST base webservices have data from different sources.

How can I code APEX to return results based on calling my REST services and returning the data and then show it in VisualSource?

Thanks