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IIUG Espaņol

Re: Preguntas del OUTER y filtros

Posted By:
Date:

Ciertamente!

Walter Milan wrote:
> que tal un indice en la tabla B por (a1,b1)?
>
> -----Original Message-----
> From: Rafael Padilla [mailto:rafaelpadilla@mayanresorts.com.mx]
> Sent: Saturday, March 15, 2003 8:29 AM
> To: iiug-esp@iiug.org
> Subject: Preguntas del OUTER y filtros [25]
>
>
> Hola a todos,
> =20
> Tengo un par de preguntas acerca del OUTER. La situaci=F3n es:
> Cuando se hace un filtro sobre una columna en un campo de la
> tabla que tiene el OUTER. =BFLa busqueda se vuelve demasiado lenta?
> Voy a ejemplificar
> Tenemos una tabla A con campos (a1, a2) y una tabla B con campos
> (b1,b2,a1) tiene
> a a1 como llave foranea opcional. suponiendo que la tabla B tiene 1
> millon=20
> de registros y la tabla A 50mil esto se vuelve lento cuando ejecuto algo
> as=ED
> =20
> SELECT b1,a1
> FROM A, OUTER B
> WHERE A.a1 =3D B.a1 AND B.b1 =3D <Un valor fijo>
> =20
> Con el filtro a=FAn con =EDndice el campo b1, mi QUERY solo trae =
> alrededor
> de 5 registros,
> pero tarda mucho procesandolos...
> =20
> =BFAlguien sabe como puedo solucionar este problema?
> =20
> =20
> SALUDOS!
> =20
> =20
> ------------------------------------
> P. Rafael Padilla Vel=E1zquez
> Database Administrator
> Mayan Resorts Co.
> Tel 52 (33) 31220880 ext 135
> Fax 52 (33) 31220880 ext 134
> ------------------------------------
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> =20
>
>
>
>
>


--


Atte,


Jesús Antonio Santos Giraldo
jeansagi@spils.com
jeansagi@netscape.net

Messages In This Thread

  • Preguntas del OUTER y filtros
    Rafael Padilla -- Saturday, 15 March 2003, at 9:28 a.m.
    • RE: Preguntas del OUTER y filtros
      Walter Milan -- Sunday, 16 March 2003, at 2:04 a.m.
      • Re: Preguntas del OUTER y filtros
        Jean Sagi -- Tuesday, 18 March 2003, at 12:14 a.m.

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