Can a table have 2 foreign keys referring back to 2 different tables? - Quora
database design - How to write a query, with multiple foreign key in mysql - Database Administrators Stack Exchange
If an entity has a foreign key that references to an other entity, does this mean that these two entities have always a relationship between them? - Quora
sql - Same foreign key for different tables in the one table - Stack Overflow
mysql - One key as foreign key for multiple table - Stack Overflow
database design - Multiple Foreign keys to a single table and single key pointing to more than one table - Stack Overflow
mysql - Is it possible to reference one column as multiple foreign keys? - Stack Overflow
How Many Foreign Key Can You Have on A Single Table? - Interview Question of the Week #096 - SQL Authority with Pinal Dave
mysql - Multiple foreign keys with different types of relationship in the same table (?) - Stack Overflow
What is a foreign key? - Definition from TechTarget
Does a foreign key reference two tables? - Quora
sql server - Relational Design - One table, two foreign keys or Two tables, one foreign key each - Database Administrators Stack Exchange