On Tue, Oct 28, 2008 at 11:36:12PM -0300, x asasaxax wrote:
> table_1: product_code, atualization_date
> table_2: id, date, value
> I need to get the value of table 2 that has the greatest date that is minor
> that atualization_date.
> The select should return something like that:
> unique product_code´s, with their atualization_date and their value
select t1.*,
(select t2.value from table_2 as t2 where t2.date < t1.atualization_date order by t2.date desc limit 1)
from table_1 as t1
;
depesz
--
Linkedin: http://www.linkedin.com/in/depesz / blog: http://www.depesz.com/
jid/gtalk: depesz@depesz.com / aim:depeszhdl / skype:depesz_hdl / gg:6749007