「缺少關鍵字」當Oracle SQL Developer中創建一個表

Question

我不斷收到如下所示的我的代碼

"SQL Error: ORA - 00905: missing keyword" in the "CREATE TABLE"

部分：

CREATE TABLE Orders (
    Received CHAR(9), 
    Shipped CHAR(9), 
    FOREIGN KEY (Ono), REFERENCES Odetails (Ono), 
    FOREIGN KEY (Cno), REFERENCES customers (Cno), 
    FOREIGN KEY (Eno), REFERENCES employee (Eno), 
    PRIMARY KEY (Ono, Cno, Eno) 
    ); 

    CREATE TABLE ZIPCODES (
    ZIP CHAR(5) NOT NULL, 
    City CHAR(20), 
    FOREIGN KEY (ZIP), REFERENCES customers (ZIP), 
    PRIMARY KEY (ZIP) 
    ); 

但是，我在同一個工作表中寫了這個代碼和沒有得到任何錯誤是如此如此：

CREATE TABLE Odetails (
    Ono CHAR(4) NOT NULL, 
    Pno CHAR(5) NOT NULL, 
    Qty CHAR(1), 
    FOREIGN KEY (Pno), REFERENCES parts (Pno), 
    PRIMARY KEY (Ono) 
    ); 

任何人都可以幫助我確定是什麼導致錯誤？

Answer 1

1）不要使用逗號

2）定義列

CREATE TABLE Orders (
    Received CHAR(9), 
    Shipped CHAR(9), 
    Ono INT NOT NULL , -- your missing columns (add datatype you need) 
    Cno INT NOT NULL, 
    Eno INT NOT NULL, 
    FOREIGN KEY (Ono) REFERENCES Odetails (Ono), -- here no comma inside 
    FOREIGN KEY (Cno) REFERENCES customers (Cno), 
    FOREIGN KEY (Eno) REFERENCES employee (Eno), 
    PRIMARY KEY (Ono, Cno, Eno) 
    ); 

CREATE TABLE ZIPCODES (
    ZIP CHAR(5) NOT NULL, 
    City CHAR(20), 
    FOREIGN KEY (ZIP) REFERENCES customers (ZIP), 
    PRIMARY KEY (ZIP) 
    ); 

考慮使用VARCHAR2數據類型，而不是CHAR。

您也可以使用內嵌的語法，如：

CREATE TABLE Orders (
    ... 
    Ono INT NOT NULL REFERENCES Odetails (Ono) 
    ... 
); 

或添加明確的約束名稱：

CREATE TABLE Orders (
     ... 
     Ono INT NOT NULL, 
     ... 
     CONSTRAINT FK_Orders_Odetails_Ono FOREIGN KEY (Ono) REFERENCES Odetails (Ono), 
     ... 
); 

Answer 2

外鍵後刪除comma所以它應該是這樣的：

CREATE TABLE Orders (
Received CHAR(9), 
Shipped CHAR(9), 
FOREIGN KEY (Ono) REFERENCES Odetails (Ono),--are you defining this Ono? 
FOREIGN KEY (Cno) REFERENCES customers (Cno), 
FOREIGN KEY (Eno) REFERENCES employee (Eno), 
PRIMARY KEY (Ono, Cno, Eno) 
);