正确的错误缺少括号错误，放置在哪里？

Question

为什么查询会产生右括号：错误报告 - ORA-00907: 缺少右括号 00907. 00000 - “缺少右括号” 我已经尝试了将正确括号放在哪里的所有方法，但它不起作用。

这是我的代码：

CREATE TABLE Trips 
(
    Trips_ID NUMBER NOT NULL,  
    Date_of_Trip DATE NOT NULL, 
    Payment NUMBER NOT NULL,
    Destination_Town VARCHAR2(50) NOT NULL, 
    Source_Town VARCHAR2 (50) NOT NULL,
    Customer_ID NUMBER NOT NULL

    CONSTRAINT Trip_pk
        PRIMARY KEY (Trips_ID),
    CONSTRAINT Customer_fk
        FOREIGN KEY (Customer_ID) REFERENCES Customer (Customer_ID),
    CONSTRAINT Owner_fk
        FOREIGN KEY (Owner_ID) REFERENCES Vehicle_Owners (Owner_ID),
    CONSTRAINT Payment_fk
        FOREIGN KEY (Payment_ID) REFERENCES Payment (Payment_ID)
);

Answer 1

在“Customer_ID NUMBER NOT NULL”之后添加一个逗号。这应该可以解决问题。