nsert into salesorder values('p1','12-june-2018','s1','p','fullfilled');

 insert into salesorder values('p2','15-may-2018','s2','f','backorder');

insert into salesorder values('p3','18-may-2018','s3','p','cancelled');

 insert into salesorder values('p4','21-may-2018','s4','f','inprocess');