On Thursday, May 21, 2015, Daniel Torres <nobeea...@gmail.com> wrote:
> I everybody, I'm new in the Postgresql world, and have an easy question: > Is it possible to have date type data that only contain month and year?, > how can I obtain that from a timestamp (without time zone) column? > > I've made this, but I think the result is a text, not a date > > select extract (Year from '2001-05-01 20:21:00'::TIMESTAMP WITHOUT TIME > ZONE)||'-'|| extract(Month from '2001-05-01 20:21:00'::TIMESTAMP WITHOUT > TIME ZONE); > > You have to settle for the first of the month if you want a date type. Date_trunc(day,...) will give you that. I do end up having a lookup tha gassing sequential integers to sequential year-months to make calculations easier without having to carry around a date type for that sole purpose. For presentation I want text, not a date. User defined functions are nice here - I have a todo to publish my set to PGXN...maybe someone else already has? David J.
