Re: Finding nearest numeric value - Mailing list pgsql-general

From Peter Fein
Subject Re: Finding nearest numeric value
Date
Msg-id 43034CD5.5090901@pobox.com
Whole thread Raw
In response to Re: Finding nearest numeric value  (Sean Davis <sdavis2@mail.nih.gov>)
List pgsql-general
Sean Davis wrote:
> On 8/17/05 8:50 AM, "Poul Møller Hansen" <freebsd@pbnet.dk> wrote:
>
>
>>Does anyone know how to find the row with the nearest numeric value, not
>>necessarily an exact match ?
>
>
> To find the nearest value in number_column to some CONSTANT (where you
> replace constant with a number), try:
>
> select *,(number_column - CONSTANT)^2 as d from tablename order by d limit
> 1;
>

Save yourself some cycles - use abs() instead of exponentiation.


--
Peter Fein                 pfein@pobox.com                 773-575-0694

Basically, if you're not a utopianist, you're a schmuck. -J. Feldman

pgsql-general by date:

Previous
From: Csaba Nagy
Date:
Subject: Re: Finding nearest numeric value
Next
From: "Jim C. Nasby"
Date:
Subject: Re: How to implement table caching