Odata v2 query merge in SAP CPI

Hello Experts,

I am working on the Integration between SFEC and CPI. The requirement is to generate the output files separately for each template (Rate, Leave, Pension).

I have created the iFlow and to meet this requirement I have to select multiple Portlets in SF system separately and how do I be able to merge the query to extract the source data.

Ex: I am using these Portlets EmployeeTime, cust_NFE_Pension_Association and EmpCompensation.

Any Inputs would be greatly appreciated.

Thank you,

Best Regards,

Sree