does oracledataadapter have same functionality as sqldataadapter does?

What I mean is the code in SaveChanges(). If I am connecting an Oracle database(remote)instead, the code gives me the error like:

an unhandled exception of type 'system.invalidOperationException'
ocureed in system.data.dll

additional information: Dynamic SQL generation for the UpdateCommand is not supported against a selectCommand that does not return any key column information.

code that I used is exactly same except I used everything oracle... instead of sql...

Thanks in advance!