If you do not have foreign key restrinctions, create a temp table from
the select as:
CREATE TEMP TABLE tmp AS SELECT DISTINCT ON (location) location, time,
report FROM weatherReports ORDER BY location, time DESC;
TRUNCATE weatherReports; INSERT INTO weatherReports SELECT * FROM tmp;
HTH
Achill
O kyrios Christoph Haller egrapse stis Jun 16, 2004 :
> Referring to the DISTINCT ON example
>
> SELECT DISTINCT ON (location) location, time, report
> FROM weatherReports
> ORDER BY location, time DESC;
maybe smth like
delete from weatherReports where (location,time,report) not in
(SELECT DI
