Validation of data between two systems for the same table

Hi,

I am comparing data of same table in two different SAP environments(ex: completely 2 different child companies under same parent company) .For retrieving data from other (2nd environment) apart from the existing i used RFC_READ_TABLE function module .

Can some one please suggest how can i get along with this task.

Any help on this is highly appreciated.

Thanks & Regards,

Pavani Achanta