如何將外鍵添加到已創建的表

Question

我已經創建了2個表。品牌和產品。在這兩個表中，一個id是主鍵並且具有標識。根據外鍵約束，它應該是另一個表的主鍵。我想讓Brandid如表Product.How的FK做that.I已經alreadyt創建table.I正在使用SQL Server 2005

Brand: 
id : -primary key,identity 
name 
lname 

Product : 
id :- primary key,identity 
location 
Brandid (id of Brand table) 

Answer 1

Use [db_name] 
Go 
alter table Product 
add constraint Product_brandid_fk FOREIGN KEY (Brandid) references Brand(id) 

Answer 2

ALTER TABLE PRODUCT 
ADD FOREIGN KEY (brandid) REFERENCES BRAND(id)