If You Have Foreign Keys, Don't Update Fields That Aren't Changing. - Brent Ozar Unlimited®
database design - MySQL permits setting a foreign key constraint that references only one column of a composite primary key - Database Administrators Stack Exchange
database first - Adding foreign key in visual studio 2012 - Stack Overflow
MySQL Foreign Key
PostgreSQL Foreign key - A Beginner's Guide
Foreign Keys in SQL Server
What is a foreign key in SQL Server
Create Foreign Key Link Dialog Help [Valentina Database Wiki v10]
How can I manually create a foreign key? / Vertabelo / Vertabelo SA
MySQL Foreign Key - javatpoint
How to add Foreign key Constraint to existing table in SQL Server-SQL Server/TSQL Tutorial Part 68 - YouTube
DELETE CASCADE and UPDATE CASCADE in SQL Server foreign key
What Is the Benefit of Foreign Keys in SQL? | LearnSQL.com