Santhosh,
The question you are asking is not clear.
In SAP HANA you write stored procedures to transform data like we do in SAP BW with transformation / ABAP. You can call stored procedures independantly or in complex scenarios you can execute stored procedures inside script based calculation views. Designing such complex calculation views needs careful design.
Please provide additional information on your requirement so that I can guide you better.
Hope this helps.
Rama