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Identifying dupes - interesting problem
Message
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00335211
Message ID:
00335666
Vues:
15
True, you can't do it in a single clean SELECT statement. However, there's a trick using UNIQUE indexes that takes care of this pretty nicely. I don't remember what it was exactly but I've listed a couple of articles from FoxTalk that might prove useful. Jinkerson & Grommes's trick uses the UNIQUE index idea.


May 1999:
Driving the Data Bus: Matchmaker, Mitchmoker ... Is That a Match? Or De-mystifying De-duplication, Andrew Coates
Finding duplicate entries in your data or matching records from different tables is a problem that has plagued database designers since databases began (and even earlier). In this article, Andrew demonstrates some of the techniques you can use to match records. Subscriber Source Code.

May 1997:

A "UNIQUE" Approach to De-Duping in FoxPro, Dave Jinkerson and Bob Grommes
Here's a simple and elegant approach to a seemingly difficult problem: removing duplicate records from a table.

Whil
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