The creation of an Oracle Database using EM 12c is an easy straight through process. If you are familiar with DBCA you might even do this with your eyes closed.
In the example I describe the creation of a Single Instance Database version 11.2.0.3, using the Grid Infrastructure.
Creating Oracle Database using EM 12c
Filed under: Provisioning, White Papers, Oracle Enterprise Manager 10 - 11g - 12c, Cloud Control 12c, oem 12c, enterprise manager cloud control, Cloud Control, em12c