I have, what I imagine to be, a fairly simple question. I have a query that produces output for a line graph. Each row represents an interval on the graph.
SELECT COUNT(call_id) AS value, EXTRACT(hour from start_time) AS hour FROM c_call WHERE start_time >= '2008-08-01 00:00:00' AND end_time <= '2008-08-01 23:59:59' GROUP BY hour This works great when there is data in each interval but when a given interval has no data the group is omitted. What is the best way to ensure that the result contains a row for each interval with the value field set to zero or null? The reporting tool is incapable of filling in the gaps. Thanks -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
