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Setting filters on large data tables
Message
De
14/02/2002 11:01:55
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivie
 
 
À
13/02/2002 18:44:03
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00619801
Message ID:
00620070
Vues:
19
>Hi -
>ANy suggestions on increasing peformance when applying a filter to a large table. Its seems to be taking forever.
>Unfortunately we can can't put the filter expression into the index.
>
>Any ideas please
>
>Thanks,
>
>Larry

If you filter a small subset of data from a large file, the filter will be slow, especially if you combine it with a grid.

Use a view instead. The view is like an updatable query, i.e., TableUpdate() will update the tables the view is based on.

Hilmar.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
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