Hi Sandy, I guess you are saying that your business or G/L financial system is currently seating on Oracle. If that is what you mean, you can use BPC's Data Manager Package to load data from the Oracle to BPC, which will end up on BPC's MS SQL server.
The BPC installation comes with the following example Packages, which can serve as a starting point.
Import SQL.dtsx
Import SQL into Fact Table.dtsx