Create Foreign Key Link Dialog Help [Valentina Database Wiki v10]
database design - MySQL permits setting a foreign key constraint that references only one column of a composite primary key - Database Administrators Stack Exchange
If You Have Foreign Keys, Don't Update Fields That Aren't Changing. - Brent Ozar Unlimited®
How to add Foreign key Constraint to existing table in SQL Server-SQL Server/TSQL Tutorial Part 68 - YouTube
Setting foreign key in phpMyAdmin - Databases - SitePoint Forums | Web Development & Design Community