Hi Raviraj,
HANA is the DB that replaces MS-SQL. You should visit Generic HANA Topics for SAP Business One. If you are looking for generic HANA knowledge visit SAP HANA Platform – SAP Help Portal Page.
On the help pages you will find a lot of information about HANA, you can use that information to decide which direction you want to go with SAP HANA. The SCN HANA site is SAP HANA and In-Memory Computing.
I hope this provides you with the information that you need.
Best regards,
Duncan