Re: extract (dow/week from date) - Mailing list pgsql-general

From Tom Lane
Subject Re: extract (dow/week from date)
Date
Msg-id 18897.1124589999@sss.pgh.pa.us
Whole thread Raw
In response to Re: extract (dow/week from date)  (Clodoaldo Pinto <clodoaldo.pinto@gmail.com>)
Responses Re: extract (dow/week from date)
List pgsql-general
Clodoaldo Pinto <clodoaldo.pinto@gmail.com> writes:
> I'm ordering by date just to show that sunday, the 0th day of the
> week, is the last day of a given week, which is not what I need.

extract(week) follows the ISO definition of week, which is pretty
strange anyway, but in particular it says that weeks start on Monday.
extract(dow) follows a different convention.  There's not a lot we
can do about this --- we're certainly not going to change extract(week),
and I can't see changing extract(dow) either.

If you feel that weeks start on Sunday you should ignore extract(week).

            regards, tom lane

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