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Re: Consulta MYSQL rango edad

#2
From: Alvaro G. Vicario
Date: Wed, 22 Sep 2004 18:49
34 lines
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*** Ariel escribi�/wrote (22 Sep 2004 10:53:11 -0700):
> hasta aqui funciona bien pero si agrego un WHERE para que me muestre
> un rango de edaddes tengo problemas

El manual de MySQL explica:

Standard SQL doesn't allow you to refer to a column alias in a WHERE
clause. This is because when the WHERE code is executed, the column value
may not yet be determined. For example, the following query is illegal: 

SELECT id, COUNT(*) AS cnt FROM tbl_name WHERE cnt > 0 GROUP BY id;


http://dev.mysql.com/doc/mysql/en/Problems_with_alias.html

Vamos, que no se puede.

Sin embargo no creo que sea necesario montar todo este barullo. Si
necesitas mostrar registros cuya edad est� entre 22 y 24 simplemente haz un
BETWEEN restando a la fecha actual 22 y 24 a�os. Supongo que hay que hacer
alg�n peque�o ajuste pero b�sicamente �sa es la idea.



(Creo que no es necesario mandar el mensaje a cuatro grupos, el tiempo de
los dem�s tambi�n tiene valor)


-- 
-+ �lvaro G. Vicario - Burgos, Spain
+- http://www.demogracia.com (la web de humor barnizada para la intemperie)
++ Las dudas inform�ticas recibidas por correo ir�n directas a la papelera
-+ I'm not a free help desk, please don't e-mail me your questions
--
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Newsgroups: es.comp.lenguajes.php,es.comp.lenguajes.misc,chile.comp.misc,es.comp.os.linux.programacion
Subject: Re: Consulta MYSQL rango edad
Date: Wed, 22 Sep 2004 20:49:53 +0200
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