create table ncustomer
(cid number(10) primary key,
name char(10),
dop date,
address varchar(20),
phno number(10),
cmno varchar(10) references ncar)

***************************
create table ncar
(mno varchar(10) primary key,
name char(10),
price number(10),
brand varchar(10)
)
*********************************
insert into customer
values(&cid,'&name','&date_of_purchasel','&address',&ph_number)

**************************
