Обсуждение: HOWTO? if it exists, increment it, else, insert it
I can't seem to get CASE to work for me here and every example that I see is using CASE in a completely different way.
have a table:
day(default CURRENT_DATE), user, count_of_a, count_of_b
index is ("day", user)
What is the best postgres way to handle updating this table?
I basically need to say,
if (day,user) exists, then increment count A
else insert day, user, and count_a = 1.
thank you in advance
have a table:
day(default CURRENT_DATE), user, count_of_a, count_of_b
index is ("day", user)
What is the best postgres way to handle updating this table?
I basically need to say,
if (day,user) exists, then increment count A
else insert day, user, and count_a = 1.
thank you in advance
am Thu, dem 25.01.2007, um 9:06:25 -0800 mailte Brian Neu folgendes: > I can't seem to get CASE to work for me here and every example that I see is > using CASE in a completely different way. > > have a table: > > day(default CURRENT_DATE), user, count_of_a, count_of_b > > index is ("day", user) > > > What is the best postgres way to handle updating this table? > > I basically need to say, > > if (day,user) exists, then increment count A > else insert day, user, and count_a = 1. > Take a look at: http://www.postgresql.org/docs/current/static/plpgsql-control-structures.html#PLPGSQL-UPSERT-EXAMPLE Andreas -- Andreas Kretschmer Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header) GnuPG-ID: 0x3FFF606C, privat 0x7F4584DA http://wwwkeys.de.pgp.net