Creating reports with multiple subject areas

Summary

Creating report with columns from multiple subject areas

Content

Hi

We are trying to create a report containing employee bank account details & National Identifiers. 

We are trying to Employee Assignment Real time SA to get the list of all employees and then adding Employee bank account details form Person Payment Details real time SA  and National identifiers from Person Real time SA.

The problem is, in the result, employees with no bank account details or Natioanl identifiers are excluded, whereas we want these records as well, with blank values under the bank account details or Natioanl identifiers column.

Help!