Media di un elenco di tempi TIMESTAMP(6) CON FUSO ORARIO

Usa il AVG funzione

SELECT avg(cast(lastprocesseddate as date)-cast(importeddate as date))
FROM feedqueueitems 
WHERE eventid = 2213283 
ORDER BY written DESC;

Nel database con il fuso orario +1 per importdate e lastprocesseddate è UTC

SELECT avg(cast(cast(lastprocesseddate as timestamp with time zone) at time zone '+01:00' as date)-cast(importeddate as date))
FROM feedqueueitems 
WHERE eventid = 2213283 
ORDER BY written DESC;