create table zamszcz
(IDZam number references zamowienia(IDZam),
nrpoz number(5),
IDTowaru number(5) references towary,
primary key(IDZam, nrpoz))


insert into zamowienia
values(1,to_date('13-mar-2013','dd-mon-yyyy'))
/



@constr zamowienia


insert into zamszcz values(1,1,1)
/


alter table zamszcz add ilosc number(5)
/


alter table towary drop constraint chtowarycena
/