In response to Louis-David Mitterrand : > Hi, > > I have time series data: price(id_price int, price int, created_on timestamp) > > I'd like to select the latest price before, say, 2010-03-10 and the > latest price after that date.
test=*# select * from price ; id_price | price | created_on ----------+-------+--------------------- 1 | 10 | 2010-01-01 00:00:00 1 | 12 | 2010-02-01 00:00:00 1 | 8 | 2010-03-01 00:00:00 1 | 15 | 2010-03-10 00:00:00 1 | 13 | 2010-03-20 00:00:00 (5 rows) test=*# select * from ( select distinct on(id_price) id_price, price, created_on from price where created_on < '2010-02-20'::date order by id_price, created_on desc ) foo union all select * from ( select distinct on(id_price) id_price, price, created_on from price where created_on > '2010-02-20'::date order by id_price, created_on asc ) bar order by id_price,created_on ; id_price | price | created_on ----------+-------+--------------------- 1 | 12 | 2010-02-01 00:00:00 1 | 8 | 2010-03-01 00:00:00 (2 rows) That's okay for you? Andreas -- Andreas Kretschmer Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header) GnuPG: 0x31720C99, 1006 CCB4 A326 1D42 6431 2EB0 389D 1DC2 3172 0C99 -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql