https://www.postgresscripts.com/tags/pg_constraint/Recent content in Pg_constraint on Postgres ScriptsHugo -- gohugo.ioenPostgresScripts.comSun, 05 Apr 2026 00:00:00 +0000https://www.postgresscripts.com/post/list-foreign-key-constraints-in-postgresql/Sun, 05 Apr 2026 00:00:00 +0000https://www.postgresscripts.com/post/list-foreign-key-constraints-in-postgresql/ <h2 id="list-foreign-key-constraints-in-postgresql">List Foreign Key Constraints in PostgreSQL</h2> <p>Foreign key constraints enforce referential integrity between tables. They guarantee that a value in one table's column always has a matching row in another table. Knowing which foreign keys exist — and how they are defined — is essential before dropping tables, renaming columns, or loading large datasets.</p> <p>This SQL query lists every foreign key in the public schema, showing the table that owns the constraint, the constraint name, and the full constraint definition including which columns it spans and which table it references.</p>