Re: [GENERAL] select using date
| От | Tim Williams |
|---|---|
| Тема | Re: [GENERAL] select using date |
| Дата | |
| Msg-id | 199901051706.LAA26380@ug.eds.com обсуждение |
| Ответ на | select using date (Kevin Heflin <kheflin@shreve.net>) |
| Список | pgsql-general |
> Trying to use select statement using CURRENT_DATE
> Which works fine like so:
>
> select * from headlines where dateof = CURRENT_DATE order by dateof desc
>
> But I'm also wanting to do something similar to:
>
> select * from headlines where dateof = CURRENT_DATE - INTERVAL '1' DAY
> order by dateof desc
>
> Basically just trying to subtract 1 day from the CURRENT_DATE
Kevin,
(1) Handy hint: try '\df' once in the psql utility.
This gives a nice list of functions, their return types, and
brief descriptions of what they accomplish.
(2) The function for which you seek is probably "timemi" which
takes a time as its first argument and a time interval
(like 1 day) as its second argument.
For example, same time yesterday:
select timemi('now'::datetime, '1 day'::timespan);
- Tim
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