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IIUG Espaņol

Preguntas del OUTER y filtros

Posted By:
Date:

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
------------------------------------
The information in this e-mail is confidential and may be legally
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reliance on it, is prohibited and may be unlawful. When addressed to our
clients any opinions or advice contained in this e-mail are subjects to
the terms and conditions in the governing MAYAN RESORTS client
engagement letter.=20

La informaci=F3n en este correo electr=F3nico es confidencial y =
legalmente
puede ser privilegiada. Est=E1 dirigida =FAnicamente al destinatario y =
nadie
m=E1s est=E1 autorizado a tener acceso a este correo electr=F3nico. Si =
usted
no es el destinatario a quien est=E1 dirigido, le est=E1 prohibido o =
puede
ser il=EDcito el copiar, distribuir, o tomar cualquier acci=F3n en =
relaci=F3n
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condiciones expresados en la correspondiente carta propuesta de MAYAN
RESORTS.

=20

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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