writing out data from a database table

Hi guys,

I am kinda new to ABAP Programming. I need to know how i can write the data stored in my database table which has the following structure:

data: begin of tablename occurs 100,

-

--

endof tablename.

I don't know how to loop into it and get the data out from it into a flat file on the application and the presentation server. right now, no data is getting written into the file because I am not looping through the table where the data is is present.

I need help asap.

Thanks,

Minal