If the web hosting account doesn't have access to the MySQL command line tools, then *probably* you could just use mysqlphpadmin to import the same ".sql" file.
If not it would be trivial to create your own PHP program to do so: It would simply read one line at a time from the ".sql" text file and issue that command to the MySQL DB.
An optimist sees the glass as half full.
A pessimist sees the glass as half empty.
A realist drinks it no matter how much there is.