Kagi only lists postgresql.org for the first 10 entries, but outdated ones in first place. With the programming scope it collapses all official do s entries to one, with GH and SO filling the rest.

For the quick answer, it also uses the 'outdated' docs as source, but as it only gives a very shallow overview there shouldn't be any difference in version (i.e. it checks for a value in a list in all versions the same, and quick answer leaves out details specific to different versions)