Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Experience with a Datawarehouse in vfp
Message
De
04/03/1999 03:13:13
 
 
À
Tous
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Titre:
Experience with a Datawarehouse in vfp
Divers
Thread ID:
00193926
Message ID:
00193926
Vues:
57
who has experience with a datawharehouse in foxpro .
we have a lot of performance problems ;
we need to download every day (with remote views) a bunch
of data from a unix box with WINUSQLI (from TRANSOFT)

My question is.
1. How can we optimise the remote views
2.how can we optimize indexes for example

All the tables can be joined with index on 3 fields
like this


example 1
sele * from x inner join y on;
str(field1) <-integer) + '-' + field2 + '-' + str(field3) <-integer) =
str(field1) <-integer) + '-' + field2 + '-' + str(field3) <-integer)
but this is very slow the tables we are talking about are
301 MB

please can you give me some performance tips
i know that you have sys fuctions where you can see if
the sql statement is rushmore optimizable .
I know that example 1 is not rushmore optimizable

David
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform