Hi Murali,
I assume you are using a HANA Trial instance on HANA Cloud Platform. Also I assume that you already managed the web-base development workbench there.
If you are in the workbench, you can open the catalog view like this (Check for the "plus" symbol in the upper left corner):
In the catalog view, then check the "SQL" Button, again in the upper left corner:
You now have a shell to execute SQL directly.
Please consider: If you are using a HANA Trial instance, certain queries might not work because of missing permissions.
Best,
Thomas.