On Mon, 21 Jul 2025 at 10:19, Mike Artz <michaelea...@gmail.com> wrote:
> Many times I have thought it would be nice if there was a QUALIFY clause > in Postgres! > > Just would like to add that including your list, Teradata, Redshift, SAP > HANA, HP Vertica, and Trino all support the QUALIFY clause. > > Also it seems Postgres would be the first leading RDBMS - meaning like > traditional, multipurpose RDMBS - to support QUALIFY, which would be pretty > cool. > Is this different from using the window functions in a subquery and then applying a WHERE clause on the outer query? SELECT … FROM (SELECT … [including window functions] FROM …) WHERE [stuff that would be in QUALIFY] I'll be honest, I'm skeptical that we need another keyword that basically means “WHERE, but applied at a different point in the query processing”. I'm not even convinced that HAVING was a good idea (although obviously I would not propose removal).
