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group by day - Mailing list pgsql-sql

From	Edward W. Rouse
Subject	group by day
Date	May 24, 2007 19:15:34
Msg-id	04c201c79e34$4e3877c0$143c520a@ntc2s.comsquared.com Whole thread Raw
Responses	Re: group by day ("A. Kretschmer" <andreas.kretschmer@schollglas.com>) Re: group by day ("Rodrigo De León" <rdeleonp@gmail.com>) Re: group by day (Richard Huxton <dev@archonet.com>)
List	pgsql-sql

I have an audit table that I am trying to get a count of the number of distinct entries per day by the external table key field. I can do a

select count(distinct(id)) from audit where timestamp >= '01-may-2007'

and get a total count. What I need is a way to group on each day and get a count per day such that the result would be something like

date count

01-may-2007 107

02-may-2007 215

03-may-2007 96

04-may-2007 0

I would prefer the 0 entries be included but can live without them. Thanks.

Oh, postgres 7.4 by the way.

Edward W. Rouse

ComSquared Systems, Inc.

770-734-5301

From: "Rodrigo De León"
Date: 24 May 2007, 18:23:52
Subject: Re: off topic

From: "A. Kretschmer"
Date: 24 May 2007, 19:42:50
Subject: Re: group by day