USE school
create table Stu_Card(
       card_id char(14),
       stu_id char (10) references students(sid) on delete cascade,
       remained_money decimal (10,2),
       constraint PK_stu_card Primary key (card_id)
)
insert into  Stu_Card values ( '05212567','800001216',100.25);
insert into  Stu_Card values ( '05212222','800005753',200.50); 
select * from Stu_card;