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Any value in unique index option?
Message
De
27/08/1998 14:23:31
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00130650
Message ID:
00130662
Vues:
22
Josh ---

You are correct, however I have found Unique indexes to be invaluable when developing. A lot of my work involves redesigning databases and migrating legacy tables into VFP. When I go to normalize a column, I create a temporary compact unique IDX to see the range of values I have to be concerned with ... I just couldn't do that with a Candidate key (even if I wanted to create a CDX)

>
>That's true, but a unique index is not the same as a candidate index. It doesn't keep you from adding duplicate values, it just ensures that only one record will appear in the index for each distinct key value.
>
>>Rock ---
>>
>>Yes, it's still needed. If you are creating a standalone index (IDX), Candidate is not an option.
>>
------------------------------------------------
John Koziol, ex-MVP, ex-MS, ex-FoxTeam. Just call me "X"
"When the going gets weird, the weird turn pro" - Hunter Thompson (Gonzo) RIP 2/19/05
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