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Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Versions des environnements
Visual FoxPro:
VFP 7 SP1
Divers
Thread ID:
01336043
Message ID:
01336207
Vues:
16
I'm not sure what 'static values' means. If they never change, you can make them a part of a query. You can also use ASCAN(). Either one could be slower than storing values in a cursor and JOIN, though.
Select * ... Where Sales.Person In ("1         ",  "23        ",   "165       ")
...
Select * ... Where ASCAN(Thisform.aSales[3], Sales.Person, ...)
>
>Thanks for the info.
>
>Is there any way to create a query that filters on static values
>
>Example:
>
>Declare Thisform.aSales[3] = 3
>Thisform.aSales[1] = "1         "
>Thisform.aSales[2] = "23        "
>Thisform.aSales[3] = "165       "
>
>Select * ... Where Sales.Person In Thisform.aSales
>
>
>>
>>A JOIN is usually faster in VFP query than IN.
>>Make sure that you have index on the 'Item' field. You can also try index on 'amount '.
>>If periodV table has significant # of records, you may also try to index on 'cid ' field in it.
>>
>>SELECT DISTINCT Sales.Person ;
>>	FROM Sales ;
>>		JOIN periodV ON Sales.fk_period = periodV.cid  ;
>>	WHERE Sales.Item = theItem ;
>>		AND Sales.amount <> 0.00 ;
>>	INTO CURSOR doamt
>>
--sb--
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