create supplier (supid  (num(5), UNIQUE),
             supname (char(20), SECONDARY),
             location (char(20)));
             
create product (prodno  (num(5), UNIQUE),
             prodname (char(20), SECONDARY),
             weight (real(10)),
             finish (char(15)));

create supply (sid  (num(5)),
             prno  (num(5)),
             quantity (num(10)), 
             foreign key sid references supid in supplier;
             foreign key prno references prodno in product;);
