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Re: odd windowing issue (perl Tk)

Subject Re: odd windowing issue (perl Tk)
From Tom Blenko <blenko@martingalesystems.com>
Newsgroups comp.sys.raspberry-pi
Message-ID <130720261630311554%blenko@martingalesystems.com> (permalink)
References (12 earlier) <slrn11584i8.rs.spamtrap42@one.localnet> <wwvy0ff3kpl.fsf@LkoBDZeT.terraraq.uk> <slrn11588nf.4f3.spamtrap42@one.localnet> <wwvik6j49x3.fsf@LkoBDZeT.terraraq.uk> <slrn115a3i3.ki8.spamtrap42@one.localnet>
Organization Newshosting.com - Highest quality at a great price! www.newshosting.com
Date 2026-07-13 16:30 -0700

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In article <slrn115a3i3.ki8.spamtrap42@one.localnet>, Robert Riches
<spamtrap42@jacob21819.net> wrote:

> An analogous thing happens in SQL database design.  Academics
> preach normalization at an absolute goal.  However, with a
> sufficiently complex system, full normalization can require each
> query to use an excessive number of joins, and that can adversely
> affect performance.  Those with practical experience in DB design
> will concede that sometimes you need to denormalize slightly in
> order to get reasonable performance.

This is nonsense and a good hint is that you are putting words in the
mouths of others and then attacking them for those words.

I've never taken a database course but I had nearly 20 years of
database design in industry for mid-level systems. I have read some
database books written by academics along the way. The claim that they
"preach normalization at (sic) an absolute goal" is plain wrong in my
experience.

The academic books I've read describe multiple normal forms. I don't
recall ever seeing one singled as superior to all the others, different
normal forms reflect different (generally theoretical) perspectives on
data and the relational calculus. Not surprising, I think, and I am
confident that being informed about different perspectives has helped
me design systems.

Database design requires a designer to balance various factors,
including where the data comes from, how it is to be maintained, and
how it is to be used (including performance of queries). I have no idea
which of all the tables I've designed and run in production may or may
not be normalized by any of the multiple normalizations that have been
described. But I read those books in order to improve my skills and it
was time well spent.

   Tom

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Thread

odd windowing issue (perl Tk) Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2026-07-08 12:03 +0100
  Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-08 17:04 +0000
    Re: odd windowing issue (perl Tk) Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2026-07-08 19:57 +0100
  Re: odd windowing issue (perl Tk) rbowman <bowman@montana.com> - 2026-07-08 17:33 +0000
    Re: odd windowing issue (perl Tk) Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2026-07-08 19:54 +0100
  Re: odd windowing issue (perl Tk) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-08 23:17 +0000
    Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-09 02:46 +0000
      Re: odd windowing issue (perl Tk) rbowman <bowman@montana.com> - 2026-07-09 04:34 +0000
        Re: odd windowing issue (perl Tk) Daniel James <daniel@me.invalid> - 2026-07-09 11:14 +0100
          Re: odd windowing issue (perl Tk) druck <news@druck.org.uk> - 2026-07-09 18:31 +0100
            Re: odd windowing issue (perl Tk) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-09 22:59 +0000
              Re: odd windowing issue (perl Tk) rbowman <bowman@montana.com> - 2026-07-10 02:54 +0000
          Re: odd windowing issue (perl Tk) rbowman <bowman@montana.com> - 2026-07-09 18:29 +0000
          Re: odd windowing issue (perl Tk) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-09 22:58 +0000
            Re: odd windowing issue (perl Tk) Daniel James <daniel@me.invalid> - 2026-07-11 12:32 +0100
              Re: odd windowing issue (perl Tk) Richard Kettlewell <invalid@invalid.invalid> - 2026-07-11 14:05 +0100
                Re: odd windowing issue (perl Tk) Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2026-07-11 19:37 +0100
                Re: odd windowing issue (perl Tk) Richard Kettlewell <invalid@invalid.invalid> - 2026-07-11 22:08 +0100
                Re: odd windowing issue (perl Tk) rbowman <bowman@montana.com> - 2026-07-12 00:01 +0000
                Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-12 03:55 +0000
                Re: odd windowing issue (perl Tk) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-12 05:53 +0000
                Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-12 16:14 +0000
                Re: odd windowing issue (perl Tk) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-12 21:42 +0000
                Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-12 22:16 +0000
                Re: odd windowing issue (perl Tk) Richard Kettlewell <invalid@invalid.invalid> - 2026-07-12 23:29 +0100
                Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-12 23:27 +0000
                Re: odd windowing issue (perl Tk) Richard Kettlewell <invalid@invalid.invalid> - 2026-07-13 08:37 +0100
                Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-13 16:11 +0000
                Re: odd windowing issue (perl Tk) Tom Blenko <blenko@martingalesystems.com> - 2026-07-13 16:30 -0700
                Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-14 04:09 +0000
                Re: odd windowing issue (perl Tk) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-14 23:43 +0000
                Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-15 03:10 +0000
                Re: odd windowing issue (perl Tk) The Natural Philosopher <tnp@invalid.invalid> - 2026-07-15 12:17 +0100
                Re: odd windowing issue (perl Tk) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-15 20:59 +0000
                Re: odd windowing issue (perl Tk) druck <news@druck.org.uk> - 2026-07-13 23:34 +0100
                Re: odd windowing issue (perl Tk) Richard Kettlewell <invalid@invalid.invalid> - 2026-07-14 08:36 +0100
                Re: odd windowing issue (perl Tk) rbowman <bowman@montana.com> - 2026-07-12 23:25 +0000
                Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-12 23:30 +0000
                Re: odd windowing issue (perl Tk) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-13 01:16 +0000
                Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-13 04:16 +0000
                Re: odd windowing issue (perl Tk) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-13 05:50 +0000
                Re: odd windowing issue (perl Tk) rbowman <bowman@montana.com> - 2026-07-12 23:22 +0000
                Re: odd windowing issue (perl Tk) Richard Kettlewell <invalid@invalid.invalid> - 2026-07-13 08:31 +0100
                Re: odd windowing issue (perl Tk) Richard Kettlewell <invalid@invalid.invalid> - 2026-07-12 09:07 +0100
                Re: odd windowing issue (perl Tk) Robert Riches <spamtrap42@jacob21819.net> - 2026-07-12 16:06 +0000
              Re: odd windowing issue (perl Tk) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-11 22:07 +0000
      resolved, sort of: Re: odd windowing issue (perl Tk) Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2026-07-09 08:41 +0100

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