Oracle：创建一个包含三个外键的复合键

Question

这是我的代码：

create table orderline
(
Order_No number(4) constraint orderno_fk references order_detail(Order_No),
Product_Code varchar2(6) constraint productcode2_fk references product(Product_Code),
Product_Size char(1) constraint productsize_fk references product_stock(Product_Size),
Product_Quantity number(4) not null
constraint orderline_comp primary key (Order_No,Product_Code, Product_Size)
);

我收到错误（在'Order'之前左括号下面有星号）：

ERROR at line 7:
ORA-00907: missing right parenthesis

Answer 1

,

之前需要constraint orderline...