![SQL SERVER - 2008 - Creating Primary Key, Foreign Key and Default Constraint - SQL Authority with Pinal Dave SQL SERVER - 2008 - Creating Primary Key, Foreign Key and Default Constraint - SQL Authority with Pinal Dave](https://blog.sqlauthority.com/i/b/5_AllQuery.gif)
SQL SERVER - 2008 - Creating Primary Key, Foreign Key and Default Constraint - SQL Authority with Pinal Dave
Can a table in SQL have multiple columns as foreign keys that refer only to one primary key of another table? - Quora
![Disadvantages of using a nullable foreign key instead of creating an intersection table - Software Engineering Stack Exchange Disadvantages of using a nullable foreign key instead of creating an intersection table - Software Engineering Stack Exchange](https://i.stack.imgur.com/LZQGa.png)
Disadvantages of using a nullable foreign key instead of creating an intersection table - Software Engineering Stack Exchange
![Can We Have NULL Value in Primary Key? - Interview Question of the Week #075 - SQL Authority with Pinal Dave Can We Have NULL Value in Primary Key? - Interview Question of the Week #075 - SQL Authority with Pinal Dave](https://blog.sqlauthority.com/wp-content/uploads/2016/06/errornull.jpg)