On Thu, 26 Mar 2015 00:25:09 +0000 "Lavrenz, Steven M" <slavrenz@xxxxxxxxxx> wrote: > I have a second table (TABLE B) with all of the object_ids and channels that are supposed to be reporting in each day. For cases where a certain channel does not check in, I want to add a column that indicates the comm failure. Not sure if your context allows it, but if you can change your program's logic, it might be easier to : -add a boolean field (e.g. 'checked') to table B, set to false -whenever an object checks in do 'update table B set checked = true where object_id = X and channel = Y' -run a cron job once a day that -runs 'select * from B where checked = false' and stores results somewhere -resets B with 'update B set checked = false' -- Salutations, Vincent Veyron https://libremen.com/ Legal case, contract and insurance claim management software -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general