transform csv file before importing into stage table

Hi,

I have a csv file with about 12 or so columns.  The issue with the file is that there are some value columns that I need to unvpivot before landing them into the staging table.  I also have to do some other formatting to the other columns, but my question is rather than just doing a straight import from the csv to the staging table, is there a way to write a query against the csv file that will allow me to do the unpivot and other formatting before I import it into the stage table?

thanks

Scott