changing the wp-config.php file

i have created a database and i’ve reached the part where i’ve to inout some data by changing the wp-config.php file in the wordpress folder. i’ve renamed the file by doing away with the “-sample” part. now the database name needs a prefix, which i’m not able to figure out.
i’ve hosted my site on yahoo small business india, and the control panel doesnt seem to give the prefix of my database name. can someone please help?? thanks a lot