Re: How to select by proximity

That works fine, thank you!

________________________________
From: Steve Crawford <scrawford(at)pinpointresearch(dot)com>
To: Francisco Leovey <fleovey(at)yahoo(dot)com>
Cc: "pgsql-novice(at)postgresql(dot)org" <pgsql-novice(at)postgresql(dot)org>
Sent: Tuesday, May 15, 2012 12:49 PM
Subject: Re: [NOVICE] How to select by proximity

On 05/15/2012 04:30 AM, Francisco Leovey wrote:
Can OFFSET be a negative number?
>What I was looking for is a way to access the +1 and -1 record with SQL as seen on the screen when you do a select using an index or a sort.
>With PgAdmin when you  see a record of interest in the middle of the display, you can visually see the one above and below.
>I seem to remember that in Informix I had a go + or -  inside a pointer loop.
>
>
Depending on your use-case you might be able to select the current and surrounding records like this:

with prev as (select * from yourtable where yourcolumn <=
'Marriot' order by yourcolumn desc limit 6),
    next as (select * from yourtable where yourcolumn > 'Marriot'
order by yourcolumn limit 5),
select * from prev
union
select * from next
order by yourcolumn
;

But if "yourcolumn" is not unique, your results may be
unpredictable.

Cheers,
Steve