關於「PostgreSQL foreign key」標籤，搜尋引擎有相關的訊息討論：

Documentation: 15: 3.3. Foreign Keys - PostgreSQLwww.postgresql.org › docs › current › tutorial-fkPostgreSQL Foreign key - A Beginner's Guide - Devart Blogblog.devart.com › How ToPostgreSQL Foreign Keywww.postgresqltutorial.com › PostgreSQL TutorialPostgreSQL Foreign key - Java