Hi Nagaraj,
Views are generated with the HANA SQL Statement CREATE VIEW, they are virtual tables based on the result of an SQL statement.
Column Views are generated with the HANA SQL Statement CREATE COLUMN VIEW. This statement is not documentated in the actual HANA SQL Reference.
Column Views are generated by SAP when Views are generated in the modeler or when a SAP BW is working on a HANA database. So Column Views exists for BW Objects like InfoCubes, InfoObjects, DSO, ... see for instance http://www.saphana.com/community/blogs/blog/2013/06/10/bw-on-hana-and-the-query-execution-mode.
You can see the generating statement for a column view in SAP HANA Studio under "Create Statement".
Regards
Rainer