insert into songdata(songid,difficulty,rating) values(165,'E',2);
insert into songdata(songid,difficulty,rating) values(165,'N',4.5);
insert into songdata(songid,difficulty,rating) values(165,'H',7.5);
insert into songdata(songid,difficulty,rating) values(165,'EX',9.5);
insert into songdata(songid,difficulty,rating) values(166,'E',2);
insert into songdata(songid,difficulty,rating) values(166,'N',5);
insert into songdata(songid,difficulty,rating) values(166,'H',7);
insert into songdata(songid,difficulty,rating) values(166,'EX',8.5);