Hi Sonchita,
As of now,we can only return one Table in a function, two or more tables are not yet supported.
You can refer this link [http://help.sap.com/hana/SAP_HANA_SQL_Script_Reference_en.pdf] [Page No. 39].
Just a suggestion, you can use HANA DB procedure to achieve the same above usecase. There you can create one more tables type structures as output.
Hope this helps.
Best Regards,
Vaibhav