Can a table have 2 foreign keys to the same table?

Can a table have 2 foreign keys to the same table?

A table may have multiple foreign keys, and each foreign key can have a different parent table. Each foreign key is enforced independently by the database system. Therefore, cascading relationships between tables can be established using foreign keys.

Can we have foreign key and primary key in same table?

If you mean “can foreign key ‘refer’ to a primary key in the same table?”, the answer is a firm yes as some replied.

Can you use the same foreign key in two different tables?

You should have a unique naming scheme for when you want to name them. Referencing and referenced table names should be involved, and when necessary distinguishing column names. Confusingly, we say FK when we mean FK constraint. When you say “It’s the same foreign key in two different tables,” that misuses terms.

Can you have the same FK constraint in two different tables?

Eg a name part plus a number part where the constraint is the numberth FK constraint of the table with that name. You can actually have the same nameless FK constraint definition text multiple times in a table and in multiple tables, each for a different FK constraint. (The ones inside a given table enforce the same FK.)

How to FK to the same table in C #?

I need a FK relationship to the same table, so I can have a Parent –> Child relationship between the elements. public class BucketGroup { public int Id {get;set;} // This is the PK in the Table public string Name {get;set;} // Now this the FK, to this Same Table: public int? BucketGroupId {get;set;} }

Can a column name be a foreign key?

There are columns and there are foreign keys (FKs) and there are constraints. You can have a column name in a table regardless of other tables. A FK is a referencing table and column set and a referenced table and column set. All the names together identify a FK.