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How to create a unique index tag unless empty?
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À
28/03/2007 16:19:12
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Versions des environnements
Visual FoxPro:
VFP 9 SP1
Divers
Thread ID:
01209419
Message ID:
01209432
Vues:
17
>>>
>>>You welcome. Make sure you don't have NULL values in the field.
>>
>>I won't have NULL values but what got me a little concerned is what Borislav said about optimization. I am thinking that maybe I should have another index tag on this field, just for optimizing queries. Does it make sense?
>
>Rushmore doesn't use indexes with For clause.

I understand now. But what if I have two index tags for the same field: one with the FOR clause and another one, without. So one will be used to enforce my business rule and another for queries. Does this make sense?
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