Why HANA ?
HANA is ready to use tool to extract SAP Database in at any given time. HANA is Online Transaction Processing (OLTP) and Online Analysis Processing (OLAP). HANA is optimized and versatile with various system interface gives end-user opportunity to work with data in real time. This helps user to use data more efficient way.
Due to such versatile capabilities user can create various reports.
Why SAP HANA is used ?
HANA is designed to give desired reports based on SAP database to replace SAP reporting system. HANA perform tasks more efficiently and quickly than SAP. as HANA has data in-memory and SAP has to fetch data every time form data tables.
Why HANA is faster than SAP ?
HANA has in-memory used. It simple terms all data is indexed and application platform. In SAP it is not possible as SAP is traditional based software. This in-memory help to extract or fetch data quick.