Constraints over Multiple Rows in PostgreSQL

As cited in DDIA

Hans-Jürgen Schönig. "Constraints over Multiple Rows in PostgreSQL." cybertec-postgresql.com, June 2021. Archived at perma.cc/2TGH-XUPZ

How the page describes itself

Constraints over multiple rows in PostgreSQL | CYBERTEC PostgreSQL | Services & Support

Constraints over multiple rows: How to cope with complex PostgreSQL constraints. Advanced techniques - enforce integrity; manage concurrency.

From the page's own metadata at cybertec-postgresql.com, 2026-10-04.

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perma.cc

https://perma.cc/2TGH-XUPZ