How to join two CDT's using Process Model without using MYSQL Queries??

@vinodb Its like I want to combine data from two CDT'S which are having one common field between them like "for ex. Id" and then storing it in a third CDT. But I am facing problem in achieving this through process model Its like details are fetched from first CDT only not from the second one. But meta data is there.

@vinodb Its like I want to combine data from two CDT'S which are having one common field between them like "for ex. Id" and then storing it in a third CDT. But I am facing problem in achieving this through process model Its like details are fetched from first CDT only not from the second one. But meta data is there.