SQL query against tables on MS SQL Server and Oracle using Oracle BI

Hi All
I have two databases Oracle and MS SQL Server. I want to write a query statement which will retrieve data from both databases and publish this data into one report. That is I want to join/merge data from tables in both database into one report with one SQL Statement something like:
Select o.F1,o.F2, m.F1,m.F2
from
table@oracleServer o,
table@microsoftSQLServer m
where o.F1=m.F1;
Can Oracle BI Publisher do this?
Basically I want to query simultaneously two heterogeneous data sources in one SQL statement. Is there such a tool? I don't want to build a warehouse by moving data from SQL Server into Oracle or vice-versa. I don't want to duplicate data. I want to be able to query data at its source via 1 SQL statement.
How would one go about doing such a thing?
Many Thanks
Kubilay.

Hi Matt and Thomas
Many thanks for your replies.
Yes I have to do the join. Even worse I have to write an Aggregate query like this!
Select o.F1,o.F2, m.F1,m.F2, count(*)
from
table@oracleServer o,
table@microsoftSQLServer m
where o.F1=m.F1
group by o.F1,o.F2, m.F1,m.F2;
These are 2 different systems (hardware & software) which actually do the same job, they produce transactions for a common business entity. Kind of, both sell tickets for the same ABC ferry company.
I can not put them side by side on the dashboard, as I need to aggregate the data and present it maybe in a Oracle BI Report for Accounting and Financial reconciliation purposes.
The truth is, as it is. I can't change it, is too late.
I have to device a way to harvest both systems as they are. I don't want to move around data. I thought looking at Oracle BI I could write SQL against multiple Data Sources. I am struggling to find a way. As it seems that it can "SQL query" 1 data source at a time.
I have been hinted on another forum (OracleTURK) to use Oracle Transparent Gateways and Generic Connectivity. http://download.oracle.com/docs/cd/B19306_01/server.102/b14232/toc.htm
Shame, I have to pay licenses for OWB and Oracle Transparent Gateways. I thought DB vendors can do better. Why do I have to pay to access the other 50% of the market.
I can understand the performance implications this might have. Because of it I might even be forced at the end to move data (ETL) into a separate database, slice it into partitions and manage it that way. Pitty because currenlty I only need one report out of these systems but seems like will be dear to get.
Thank you for all your help.
Kubilay

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