From: Richard Broersma Jr <rabroersma@yahoo.com>
To: Partha Guha Roy <partha.guha.roy@gmail.com>
To: pgsql-sql@postgresql.org
Subject: Re: Need to subtract values between previous and current row
Date: Fri, 15 Dec 2006 05:12:01 -0800 (PST)
Message-ID: <297264.3730.qm@web31806.mail.mud.yahoo.com> (raw)
In-Reply-To: <6bdfe880612150427o19bfe90ch87a972c0f5898ffb@mail.gmail.com>
>
> ID ATIME (MM/dd/yyyy)
> == ====
> 1 10/12/2006
> 2 10/14/2006
> 3 10/18/2006
> 4 10/22/2006
> 5 10/30/2006
>
> Now I need a query that will subtract atime of row 1 from row 2, row2 from
> row3 and so on...
just an idea.
select (A.atime - max(B.atime)) duration
from table A join table B
on (A.atime > B.atime)
group by A.atime;
Regards,
Richard Broersma Jr.
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To: pgsql-sql@postgresql.org
Cc: rabroersma@yahoo.com, partha.guha.roy@gmail.com
Subject: Re: Need to subtract values between previous and current row
In-Reply-To: <297264.3730.qm@web31806.mail.mud.yahoo.com>
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