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Unique Record Table
Message
De
17/07/1997 00:06:55
 
 
À
16/07/1997 21:46:01
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00040341
Message ID:
00040357
Vues:
27
Use SELECT SQL with UNION clause (it eliminates duplicates) or append everything in one table and index it UNIQUE.

Vlad

>As part of my thesis at Navy Postgraduate School, I have a genetic algorithm that runs in MS VFP 5.0. The output of the GA is a table with approximately 15 fields and usually about 5000 unique records. Every time I run the GA, I save the output in a table archive. Now, I have approximately 20 tables in the archive.
>
>I would like to create a new table which retrieves only the unique records from each of these 20 archived tables. There are no repeat records within each table. Again, each table has the same structure. I have tried appending records, which works, but it does not eliminate repeats. Is there a way of automatically eliminating repeats after the appendage? Or is there a method of using the 'join' (or some other) feature to do this? For each table, there is approximately 20%-30% intersection, so doing it manually is out of the question.
>
>Thank you,
>LT Jason W. Carter
>U.S. Navy
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