Marco <netuse@xxxxxxxxxxx> Friday 25 March 2011 14:25:47 > Hi, > > I have a table like this: > > id date min max value > 1 2011-03-25 20 30 17 > 3 2011-03-21 40 55 43 > 3 2011-03-23 40 55 52 > 2 2011-02-25 5 2 > 4 2011-03-15 74 > 4 2011-03-25 128 > 1 2011-03-22 20 30 24 > > I'm looking for a query that outputs the last rows (highest date) per id > where the value is between min and max. I already have problems displaying > the last rows per id. Something like > > select id, max(date) from mytable group by id; > > gives just the id and the date, not the other values. I think of doing this > in two steps: > > 1) Display the rows with the highest date per id. That gives as many rows > as ids exist. > 2) Remove the rows that do not match ( value<max and value>min ) > > > Marco SELECT * FROM where (min < value and value < max) and (id, date) in ( SELECT id, max(date) WHERE (min < value and value < max) group by id) 1st check (min < value and value < max) may be not needed, dependig what You are looking for. I didn't testd this -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
