如何使用SubSonic将数据库从SQL Server更改为Oracle？

I write code with SubSonic 2.1.1 and used MSSQL. The project must be run with Oracle now. I changed web.config, and it does not work. Can someone give me a sample which changes database only - changes web.config with subsonic and the rest doesn't change?I write code with SubSonic 2.1.1 and used MSSQL