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Primary keys and candidate keys
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Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
00413219
Message ID:
00413234
Vues:
26
>Juan;
>
>Do you mean that if you have a person with Social Security # 111-11-1111, and then delete him, that you can't later add him, or another person with an SS# of 111-11-1111? If that's what your problem is, you can put a filter on your candidate for for NOT DELETED(). Then when a record is deleted, it is removed from the index as well.
>

Hey that's a cool trick that I hadn't thought of before. But wouldn't it be better (for rushmore optimization) to add the deleted function in the index expression instead of using a filter.

Maybe it doesn't make any difference... Just a thought I had.
Rip Ryness
International Falls, MN
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