Re: Random numbers

From: Ian Lawrence Barwick <barwick(at)gmail(dot)com>
To: bricklen <bricklen(at)gmail(dot)com>
Cc: Karel Riveron Escobar <kescobar(at)estudiantes(dot)uci(dot)cu>, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Random numbers
Date: 2013-05-25 15:56:52
Message-ID: CAB8KJ=iyvh=DYWN+n2SuWYvuXS71TjLUnC5vN3mB=GzQoQX1CA@mail.gmail.com
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2013/5/26 bricklen <bricklen(at)gmail(dot)com>:
>
> On Sat, May 25, 2013 at 8:45 AM, Karel Riveron Escobar
> <kescobar(at)estudiantes(dot)uci(dot)cu> wrote:
>>
>> I want to generate random numbers in Pl/pgSQL. How can I do this?
>> To be more specific, I have to generate random numbers among 0 and 5.
>
>
> One way:
> select n from unnest(ARRAY[0,1,2,3,4,5]) n order by random() limit 1;

somewhat shorter:
SELECT (random() * 5)::INT

Ian Barwick

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