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From:Thomas Spahni Date:March 13 2009 6:46pm
Subject:Re: avoiding use of Nulls (was: The <=> operator)
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On Fri, 13 Mar 2009, michael@stripped wrote:

> Explanation(5): The more you understand how the database is to be used,
> and the more complexity and thought you put into your database design, the
> less complex it will be to retrieve reliable information out of it.
> Furthermore, (and this is probably what makes me crazy when Nulls are
> evolved) after a ten year stretch of software development, where I and a
> team designed our own databases, I did a nine year stretch of statistical
> programming, using databases designed by other people, and Nulls in the
> data made the results unpredictable, and yeah, made me crazy! I had to
> write nightly processes to resolve inconsistencies in the data, if at
> least report inconsistencies. You know the old saying "Garbage in =
> Garbage out", to me Nulls are garbage, and if there is a good reason for
> nulls to be a part of good clean data then someone please help me
> understand that.

Hi

I'm in a argumentative mood today too. :-)

I have a database logging weather data. When a station does not report a 
temperature, it is set to NULL. It would be a very bad idea to set it to 0 
as this would ruin the whole statistics.

NULL is a perfectly valid information in many cases.

Cheers
Thomas
Thread
The <=> operatorMorten13 Mar
  • Re: The <=> operatorMichael13 Mar
    • avoiding use of Nulls (was: The <=> operator)Ray13 Mar
      • Re: avoiding use of Nulls (was: The <=> operator)michael13 Mar
        • Re: avoiding use of Nulls (was: The <=> operator)Thomas Spahni13 Mar
          • Re: avoiding use of Nulls (was: The <=> operator)michael13 Mar
            • Re: avoiding use of NullsAndy Wallace13 Mar
              • Re: avoiding use of NullsArthur Fuller14 Mar
            • Re: avoiding use of NullsPJ13 Mar
            • Re: avoiding use of Nulls (was: The <=> operator)Claudio Nanni14 Mar
              • Re: avoiding use of Nulls (was: The <=> operator)Morten14 Mar
              • Re: avoiding use of Nulls (was: The <=> operator)michael14 Mar
                • Re: avoiding use of Nulls (was: The <=> operator)Mattia Merzi15 Mar
                • Re: avoiding use of Nulls (was: The <=> operator)Claudio Nanni15 Mar
                  • Re: avoiding use of Nulls (was: The <=> operator)Don Read15 Mar
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            • Re: avoiding use of Nulls (was: The <=> operator)Mattia Merzi14 Mar
        • Re: avoiding use of Nulls (was: The <=> operator)Ray14 Mar
          • Re: avoiding use of NullsAMichel Durand14 Mar
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