Can you do a foreign key within a single table, though? I've only ever seen foreign key constraints tying a field in one table to a field in another table.

In PostgreSQL, you define a foreign key using the foreign key constraint. The foreign key constraint helps maintain the referential integrity of data between the child and parent tables. A foreign key ...

SQL Foreign Key Mapper is a Python script designed to extract foreign key relationships from a SQL dump file and generate SQL queries to add foreign key constraints between related tables. The script ...

I'm adding a table and subclass table to my DB. (Subclass table = table where the primary key joins to the primary key of another table, to give extra row information to some subset of the rows ...

Learn how to name and document foreign keys in SQL Server to improve your database design and performance. Avoid common pitfalls and challenges with foreign keys.