A: 

This is not possible - Excel is a binary format. You have to save it as a comma-separated values file (.CSV) from Excel. You might also be able to come up with some convoluted solution using an Access database that links to the Teradata table and the spreadsheet.

jnylen
Thanks for your response. Atlast somebody from teradata's unknown land somebody responded. I will definitely look into the solution you proposed. But one thing is we can import data from excel file into teradata table using Teradata SQL assistant. Then why can't we use BTEQ for similar purpose? If it is really not possible then I will leave it. Once again thanks.
Enjoy coding
You can't import data from an xls file in SQL Assistant. You can only save your answerset as one. I think the reason SQL Assistant even knows about Excel is tha it is a Windows app whereas BTEQ is a more generic lower level cross-platform command-line app.
Carlos A. Ibarra