SQL Server Express 2012外鍵不會填充到表

Question

我在我的智慧結束在這裏，所以任何幫助，將不勝感激。這裏有三個查詢我運行：

CREATE TABLE Contact 
(ContactID VARCHAR(10) NOT NULL, 
ContactCompanyName VARCHAR(80), 
ContactFirstName VARCHAR(30), 
ContactLastName VARCHAR(30), 
EmployeeID VARCHAR(15), 
CONSTRAINT Contact_PK PRIMARY KEY (ContactID)); 

GO 

CREATE TABLE CompanyRepresentative 
(EmployeeID VARCHAR(15) NOT NULL, 
RepFirstName VARCHAR(30), 
RepLastName VARCHAR(30), 
CONSTRAINT CompanyRepresentative_PK PRIMARY KEY (EmployeeID)); 

GO 

其次：

ALTER TABLE Contact 
ADD CONSTRAINT fk_EmployeeID1 
FOREIGN KEY(EmployeeID)REFERENCES CompanyRepresentative(EmployeeID); 

GO 

最後：

INSERT dbo.Contact (ContactID, ContactCompanyName, ContactFirstName,  

ContactLastName) 
VALUES 
('PC7432', 'Krueger Bakeries', 'Brian', 'Jones'), 
('PC5317', 'Advanced Data Storage', 'Mark', 'Pulley'), 
('PC2931', 'M&D Graphics and Design', 'Mike', 'Dorris'), 
('PC1753', 'Apex Digital Solutions', 'Janice', 'Becker'), 
('PC8527', 'Infensus Consultants', 'Narbeth', 'Pokrehl'); 

GO 

INSERT dbo.CompanyRepresentative (EmployeeID, RepFirstName, RepLastName) 
VALUES 
('TBOC53297', 'Mike', 'Hartman'), 
('TBOC32781', 'Lynn', 'Kynes'), 
('TBOC12783', 'Jason', 'McCann'), 
('TBOC43971', 'Susan', 'Mueller'), 
('TBOC29753', 'Greg', 'Krebs'); 

GO 

當我運行

select * from Contact 

僱員ID字段不不顯示外部值關鍵EmployeeID從表dbo.CompanyRepresentative而不是它顯示「NULL」。我錯過了什麼？

Answer 1

您必須插入EmployeeID這樣。否則默認SQL Server將NULL插入到該字段中。

INSERT dbo.Contact (ContactID, ContactCompanyName, ContactFirstName, ContactLastName, EmployeeID) 
VALUES 
('PC7432', 'Krueger Bakeries', 'Brian', 'Jones', 'TBOC53297'), 
('PC5317', 'Advanced Data Storage', 'Mark', 'Pulley','TBOC32781'), 
('PC2931', 'M&D Graphics and Design', 'Mike', 'Dorris','TBOC12783'), 
('PC1753', 'Apex Digital Solutions', 'Janice', 'Becker','TBOC43971'), 
('PC8527', 'Infensus Consultants', 'Narbeth', 'Pokrehl','TBOC29753'); 

GO