Question

我试图创建一个包含几个具有相同FK约束的列的表。我的语法有什么问题？我收到了一个msg 102，错误的语法错误围绕＆＃34; fk_fighterID＆＃34;

＆＃34; FIGHTERS＆＃34;是一个用＆＃34; fighterID＆＃34;设置的表格。作为主键

CREATE TABLE FIGHTS
(
FIGHTID INT PRIMARY KEY, 
CONSTRAINT fk_fighterID FOREIGN KEY REFERENCES FIGHTERS(fighterID),
FIGHTER_ID_CHALLANGER int fk_fighterID,
FIGHTER_ID_CHALLANGED int fk_fighterID, 
CONSTRAINT fk_weightclass FOREIGN KEY (classID) REFERENCES WEIGHT_CLASSES 
      (classID)
WEIGHTCLASS NOT NULL fk_wightclass, 
IS_MAIN BIT NOT NULL,
IS_CO_MAIN BIT NOT NULL,
SCHEDULED ROUNDS TINYINT(1),
CONSTRAINT fk_WINMETH FOREIGN KEY (WINID) REFERENCES WINNING_METHODS (WINID)
WINNING METHOD NOT NULL fk_WINMETH
)
;

Answer 1

正确陈述 CONSTRAINT fk_weightclass FOREIGN KEY (classID) REFERENCES WEIGHT_CLASSES (classID)

声明不正确 CONSTRAINT fk_fighterID FOREIGN KEY REFERENCES FIGHTERS(fighterID),

您忘记提及'（classId）'等内容。

编辑：我不确定您要实现的目标，但您的上述查询是错误的，如果有意义，请尝试以下查询。

CREATE TABLE FIGHTS ( FIGHTID INT PRIMARY KEY, FIGHTER_ID_CHALLANGER INT, FIGHTER_ID_CHALLANGED INT, IS_MAIN BIT NOT NULL, IS_CO_MAIN BIT NOT NULL, SCHEDULED_ROUNDS TINYINT(1), WEIGHTCLASS INT NOT NULL, CLASS_ID INT NOT NULL, WINNING_METHOD INT NOT NULL, CONSTRAINT fk_fighterID FOREIGN KEY (FIGHTER_ID_CHALLANGER) REFERENCES FIGHTERS (fighterID), CONSTRAINT fk_weightclass FOREIGN KEY (CLASS_ID) REFERENCES WEIGHT_CLASSES (classID), CONSTRAINT fk_WINMETH FOREIGN KEY (WINNING_METHOD) REFERENCES WINNING_METHODS (WINID) );

Answer 2

不应该将约束放在表创建语句之外，如下所示：

CREATE TABLE Sales.TempSalesReason (TempID int NOT NULL, Name nvarchar(50), 
CONSTRAINT PK_TempSales PRIMARY KEY NONCLUSTERED (TempID), 
CONSTRAINT FK_TempSales_SalesReason FOREIGN KEY (TempID) 
    REFERENCES Sales.SalesReason (SalesReasonID) 
    ON DELETE CASCADE
    ON UPDATE CASCADE
);

使用FK创建SQL表

2 个答案: