爲什麼會出現關鍵字錯誤？

Question

CREATE TABLE SORDER (
    C_NO CHAR(4), 
    P_NO CHAR(4), 
    QUANTITY SMALLINT, 
    PRIMARY KEY (C_NO, P_NO), 
    CONSTRAINT CNO_FK FOREIGN KEY (C_NO) REFERENCES CUSTOMER ON DELETE RESTRICT, 
    CONSTRAINT PNO_FK FOREIGN KEY (P_NO) REFERENCES PRODUCT2 ON DELETE RESTRICT 
); 

ORA-00905：缺少關鍵字

這裏順便說一句其他兩個表。

CREATE TABLE PRODUCT2 (
    P_NO CHAR(4) PRIMARY KEY, 
    P_NAME CHAR(6), 
    PRICES DECIMAL(3,2), 
    STOCK SMALLINT 
); 

CREATE TABLE CUSTOMER2 (
    C_NO CHAR(4) PRIMARY KEY, 
    C_NAME CHAR(6), 
    CITY CHAR(11) 
); 

Answer 1

嘗試下面的代碼

CREATE TABLE SORDER (
    C_NO CHAR(4), 
    P_NO CHAR(4), 
    QUANTITY SMALLINT, 
    PRIMARY KEY (C_NO, P_NO), 
    CONSTRAINT CNO_FK FOREIGN KEY (C_NO) REFERENCES CUSTOMER ON DELETE RESTRICT, 
    CONSTRAINT PNO_FK FOREIGN KEY (P_NO) REFERENCES PRODUCT2 ON DELETE RESTRICT 
); 

Answer 2

甲骨文僅支持ON DELETE SET NULL或ON DELETE CASCADE作爲關鍵字。

的ON DELETE子句讓你決定如何甲骨文：從手動http://docs.oracle.com/cd/B28359_01/server.111/b28286/clauses002.htm#CJABCJJF

報價：中ON DELETE RESTRICT功能由離開了ON DELETE

CREATE TABLE SORDER (
    C_NO CHAR(4), 
    P_NO CHAR(4), 
    QUANTITY SMALLINT, 
    PRIMARY KEY (C_NO, P_NO), 
    CONSTRAINT CNO_FK FOREIGN KEY (C_NO) REFERENCES CUSTOMER2, 
    CONSTRAINT PNO_FK FOREIGN KEY (P_NO) REFERENCES PRODUCT2 
); 

有關詳情請參閱手冊實現如果刪除引用的主鍵或唯一鍵值，數據庫會自動維護參照完整性。如果忽略該子句，則Oracle不會允許你刪除父表有子表

這裏依賴行引用的鍵值是SQLFiddle：http://sqlfiddle.com/#!4/07e93/1