From: PFC <lists@boutiquenumerique.com>
To: David B <davidb999@gmail.com>
To: pgsql-sql@postgresql.org
Subject: Re: ORDER BY handling mixed integer and varchar values
Date: Mon, 16 May 2005 21:12:28 +0200
Message-ID: <op.sqvua2ogth1vuj@localhost> (raw)
In-Reply-To: <c76ea21c050516114742818cfa@mail.gmail.com>
References: <c76ea21c050516114742818cfa@mail.gmail.com>
> Is there any elegent query you folks can think of that combines the
> two so I can one query that has alpha sorting on alpha categories and
> numeric sorting on numeric values that are in the same column??
solution 1 (fast)
make a separate column which contains the integer value (updated via a
trigger) or NULL if it's a textual value, then sort on it
solution 2
order by the string padded to a fixed length by adding spaces to the left :
(here an underscore is a space):
____1
___10
_ABCD
I think there's a LPAD function (look in the docs) to do that... you can
use only the first N (like 10) chars of the string...
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To: pgsql-sql@postgresql.org
Cc: lists@boutiquenumerique.com, davidb999@gmail.com
Subject: Re: ORDER BY handling mixed integer and varchar values
In-Reply-To: <op.sqvua2ogth1vuj@localhost>
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