in Crystal XI after opening a new blank report to create a connection to Oracle Database,
- right click on Databse Fileds –> Database Expert (or menu Database –> Database Expert)
- click on create new connection
- one of the option is Oracle where you can defne the server from which you need to read with user name and password or connect to an existing ODBC (an existing link to Oracle)
You wont see Oracle as an option, if you dont have Oracle Client installed.