[rjbwork]

Available on postgres as an extension. It's a bit jank and doesn't have language integrated clauses like sql server.

[WorldMaker]

Temporal Tables and their query language were formalized in ANSI SQL 2011 standard, so hopefully it is only a matter of time and resources to see it added into the postgres core directly.

[rjbwork]

Indeed...it's why I still pick MS SQL for certain projects.