-------- Original Message --------
Subject: [GENERAL] Working with dates
From: Ranieri Mazili <ranieri.oliveira@xxxxxxxxxxxx>
To: pgsql-general@xxxxxxxxxxxxxx, pgsql-sql@xxxxxxxxxxxxxx
Date: 5/7/2007 16:00
Hello,
I need to do the following select:
Number of days of month - weekends - holydays
So this query will return the number of days that people can work
Look that I have the holydays in one table, it's bellow:
CREATE TABLE holidays
(
id_holidays serial NOT NULL,
dt_holiday date,
holiday_description character varying(60),
input_date timestamp without time zone NOT NULL,
CONSTRAINT holidays_pkey PRIMARY KEY (id_holidays)
)
I have no idea of how do it
If someone could help, I would appreciate.
Thanks
---------------------------(end of broadcast)---------------------------
TIP 6: explain analyze is your friend
I can.
select count(A.data)
from (select (date_trunc('month',(select production_date from production
order by production_date desc limit 1)::date)::date + x * '1
day'::interval)::date as data from generate_series(0,31) x) A
where extract(month from A.data) = extract(month from (select
production_date from production order by production_date desc limit
1)::date )
and extract(dow from A.data) <> 0
and extract(dow from A.data) <> 6
and A.data not in (select dt_holiday from holidays)
