Hi Indira,
you can import a flat file into hana using below steps-
Login to SAP HANA Development - SAP HANA Studio
File
->Import
->SAP Hana Content
->Data from local file
Here you have 2 options-
1- to insert into a new table
2. you can create a table using sql command in your schema using hana sql editor and try giving the same table name for importing flat file.
Regards,
Saritha K