From: Kevin Crain <kevin.crain1@gmail.com>
To: Jasen Betts <jasen@xnet.co.nz>
Cc: pgsql-sql@postgresql.org
Subject: Re: selecting records X minutes apart
Date: Sat, 4 Jun 2011 08:49:09 -0700
Message-ID: <BANLkTimnn2zMO9C3BxTPHPPnRv1q-MGijQ@mail.gmail.com> (raw)
In-Reply-To: <isd5s4$86l$1@reversiblemaps.ath.cx>
References: <20110603195253.GE1324@slacker.ja10629.home>
<isd5s4$86l$1@reversiblemaps.ath.cx>
It looks like maybe he is trying to fetch records that either have no
previous entries or have another record with a timestamp 5 minutes
before them at the time they are inserted...
On Sat, Jun 4, 2011 at 4:45 AM, Jasen Betts <jasen@xnet.co.nz> wrote:
> On 2011-06-03, lists-pgsql@useunix.net <lists-pgsql@useunix.net> wrote:
>>
>> ID TS (HH:MM)
>> -------------------
>> 0 20:00
>> 0 20:05
>> 0 20:10
>> 1 20:03
>> 1 20:09
>>
>>
>> Does my question make sense?
>
> no, why is (1,20:04) excluded, but (0,20:05) included?
> both records are 5 minutes from the newest.
>
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To: pgsql-sql@postgresql.org
Cc: kevin.crain1@gmail.com, jasen@xnet.co.nz
Subject: Re: selecting records X minutes apart
In-Reply-To: <BANLkTimnn2zMO9C3BxTPHPPnRv1q-MGijQ@mail.gmail.com>
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