November 11, 2026

Open Systems, Blockchain & Business Daily

Explainers: PostgreSQL

Open wooden card-catalog drawer: blank cream index cards packed in an even row at the back, several cards pushed in at odd angles near the front, and a cobalt-blue paper strip at the open end.

UUID v4 vs v7: Which to Use as a Database Key

UUID v7 starts with a timestamp, so new keys append to the index. A 10-million-row PostgreSQL test and its catch.