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Re: Timestamp problems...wrong weeks.

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Campano, Troy wrote:

Is there any way with SQL to get what I'm trying to get?
Where (in this month, April):
April 1 - 3 (Week 1)
April 4 - 10 (Week 2)
April 11 - 17 (Week 3)
April 18 - 24 (Week 4)
April 25 - 30 (Week 5)

Thank you!

~ Troy Campano ~



-----Original Message-----
From: pgsql-general-owner@postgresql.org
[mailto:pgsql-general-owner@postgresql.org] On Behalf Of Andrew Sullivan
Sent: Thursday, April 29, 2004 3:42 PM
To: Pgsql-General
Subject: Re:  Timestamp problems...wrong weeks.

On Thu, Apr 29, 2004 at 02:42:49PM -0400, Campano, Troy wrote:


This is causing my reports to print out incorrect data.
Do you know why this would happen? Am I doing something wrong?



I think you may be misunderstanding what "W" means:


week of month (1-5) (The first week starts on the first day of the
month.)

In April 2004, 1 April is Thurs, so

1-7 -> W1
8-14 -> W2
15-21 -> W3
22-28 -> W4
29-30 -> W5 == W1 of May

This is also why 8 May is in week 2 of May, but 7 May is on week 1.

A



take a look

select date_part('week', CURRENT_DATE) -
  date_part('week', date_trunc('month', CURRENT_DATE)) + 1;

---------------------------(end of broadcast)---------------------------
TIP 9: the planner will ignore your desire to choose an index scan if your
     joining column's datatypes do not match

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