Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Performance with Views
Message
De
22/02/2000 13:18:51
Walter Meester
HoogkarspelPays-Bas
 
 
À
21/02/2000 19:49:10
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00335132
Message ID:
00335492
Vues:
18
Milt,

>I have purchased Jim Booth book on FoxPro and want to use local views in my application. The application is not client server I am using FoxPro tables. Is there any performance benefit to using view versus set filter. Thanks

It depends..

If you're going to adress only a fraction of the table then use views. Local views are ideal for small resultsets because it makes navigation trough the resultset faster.

If you're going to adress large portions of the table(s), then use filters because the local views will take significant amounts of time to execute. Also if the filter's selectivity is low (a low percentage of the table is filtered out), you'll have no performance problems with navigation, plus the advantage of being able to use the original indexes of the table.

Walter,
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform