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Setting filters on large data tables
Message
De
13/02/2002 19:46:07
Larry Long
ProgRes (Programming Resources)
Georgie, États-Unis
 
 
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:
00619818
Vues:
19
1) Have an index for each field that is part of the filter
2) SET DELE OFF, assuming you don't have any deleted records. If you do have deleted records, change the way you remove records to rename key id's or setting a flag field vs deleting...either that or pack often.
3) Use SELECT *... vs filter
4) Don't have tables index orders set while filter is active.

>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
L.A.Long
ProgRes
lalong1@charter.net
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