Re: Extract week from date, start with sunday

am 07.11.2005, um 14:47:35 +0100 mailte Robert Blixt folgendes:
>
> Hi,
>
>
> I am currently extracting my weeks from a date like this..
>
> SELECT INTO extractweek EXTRACT( week FROM ldate );
>
> This works fine, except that this assumes (according
> to ISO standard) that weeks starts with Monday.
>
> I need the weeks to start with Sunday instead, otherwise
> I will not get the correct week.
>
> Is there a workaround for this?

Add 1 day to ldate.

test=# select to_char('2005-11-05'::date+'1 day'::interval, 'IW');
to_char
---------
44
(1 row)

test=# select to_char('2005-11-06'::date+'1 day'::interval, 'IW');
to_char
---------
45
(1 row)

HTH, Andreas
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Andreas Kretschmer (Kontakt: siehe Header)
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