Re: Hashing for DISTINCT or GROUP BY in SQL

From: Erwin <e.smout_at_myonline.be>
Date: Tue, 12 Oct 2010 10:44:08 -0700 (PDT)
Message-ID: <42bafa8e-5eb0-4149-94c9-f90870b5857f_at_u10g2000yqk.googlegroups.com>

On 12 okt, 18:35, -CELKO- <jcelko..._at_earthlink.net> wrote:

> Does there exist a set of hashing functions, H1(), H2(), .., Hn()
> which will produce at least one different result for any pair of data
> values?

If you can explain to me how a _SET_ (of hashing functions) can "PRODUCE" a result, then I might consider trying to think about this. Received on Tue Oct 12 2010 - 19:44:08 CEST

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