I am in search of a technical perspective regarding the following questions. I have heard the sales side of things, but I want a deeper understanding of the technical benefits.

Here are my questions:

1. What are the benefits of using an Oracle 10g warehouse over a SAS 9 warehouse?

2. What are the benefits to using Oracle ETL tools over SAS ETL tools?

3. Is there any benefit to using an Oracle warehouse if the ETL, analytic, portal, and reporting solutions are all SAS?

4. What is the best operating system to run Oracle 10g on for a data warehouse?

5. What is the best operating system to run SAS 9 on for a data warehouse?

Thanks for any assistance you can provide!