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<p class="MsoNormal"><span style="color:#1F497D">Hi Paul,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks for that. Very interesting. I’m not near the host on which we have this data, but I’m wondering now if a case conversion may be all that’s required in the comparison.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Marty<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:EN-GB">From:</span></b><span lang="EN-US" style="mso-fareast-language:EN-GB"> Paul A. <paul@ipauland.com>
<br>
<b>Sent:</b> 17 June 2021 17:08<br>
<b>To:</b> Martin Bowes <martin.bowes@ndph.ox.ac.uk>; info-ingres@lists.planetingres.org<br>
<b>Subject:</b> Re: [Info-ingres] Micro-madness<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I just googled this.<span style="font-size:12.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">B5 is lower-case mu, BC is upper-case mu<br>
<br>
So they are different.<br>
<br>
<a href="https://www.compart.com/en/unicode/U+00B5">https://www.compart.com/en/unicode/U+00B5</a><br>
<br>
On 17/06/2021 15:26, Martin Bowes wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#1F497D">Yeah, that’s the idea I’ve explored with the user. It’s amazing what you can do with the replace function.
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Something a bit more general may still be required as I’m pretty well guaranteed to bump into this elsewhere.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Marty</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:EN-GB">From:</span></b><span lang="EN-US" style="mso-fareast-language:EN-GB"> Paul A.
<a href="mailto:paul@ipauland.com"><paul@ipauland.com></a> <br>
<b>Sent:</b> 17 June 2021 15:21<br>
<b>To:</b> <a href="mailto:info-ingres@lists.planetingres.org">info-ingres@lists.planetingres.org</a><br>
<b>Subject:</b> Re: [Info-ingres] Micro-madness</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Choose one representation and change the codes, use an insert/modify rule to force consistency?<br>
<br>
On 17/06/2021 14:17, Martin Bowes wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#1F497D">I’m seeing some progress…nvarchar stores Unicode points as UTF-8.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">And:</span><o:p></o:p></p>
<p class="MsoPlainText"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">The UTF-8 encoding of mu (</span>U+03BC)
<span style="font-size:12.0pt;font-family:"Times New Roman",serif">is 0xCE 0xBC</span><o:p></o:p></p>
<p class="MsoPlainText"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><a href="https://www.utf8-chartable.de/unicode-utf8-table.pl?start=896&number=128&names=-&utf8=0x">https://www.utf8-chartable.de/unicode-utf8-table.pl?start=896&number=128&names=-&utf8=0x</a></span><o:p></o:p></p>
<p class="MsoPlainText"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"> </span><o:p></o:p></p>
<p class="MsoPlainText"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Also the UTF-8 encoding of mu(</span>U+00B5) is
<span style="font-size:12.0pt;font-family:"Times New Roman",serif">0xC2 0xB5</span><o:p></o:p></p>
<p class="MsoPlainText"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><a href="https://www.utf8-chartable.de/unicode-utf8-table.pl?start=128&number=128&names=-&utf8=0x">https://www.utf8-chartable.de/unicode-utf8-table.pl?start=128&number=128&names=-&utf8=0x</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">So we have two Unicode code points for mu…why I know not.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">And I still don’t know how to get them to equate.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Marty</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:EN-GB">From:</span></b><span lang="EN-US" style="mso-fareast-language:EN-GB"> Tony Douglas
<a href="mailto:tonyd08068@netscape.net"><tonyd08068@netscape.net></a> <br>
<b>Sent:</b> 17 June 2021 14:05<br>
<b>To:</b> Martin Bowes <a href="mailto:martin.bowes@ndph.ox.ac.uk"><martin.bowes@ndph.ox.ac.uk></a><br>
<b>Cc:</b> <a href="mailto:info-ingres@lists.planetingres.org">info-ingres@lists.planetingres.org</a><br>
<b>Subject:</b> Re: [Info-ingres] Micro-madness</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Unicode…. There be dragons. Might be something to do with normalisation form - NFC and NFD say how codes can combine to form different characters - this page <a href="https://www.win.tue.nl/~aeb/linux/uc/nfc_vs_nfd.html">https://www.win.tue.nl/~aeb/linux/uc/nfc_vs_nfd.html</a> might
help, or it might not - I was just about getting unconfused with the terminology of Unicode when I stopped looking at it a few years ago :( But weird things could happen. Have you tried a UTF8 client to see what happens (assuming you’ve got an installation
where transliteration is available) ?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Looking forward to seeing how this pans out !<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">- Tony<o:p></o:p></p>
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<p class="MsoNormal">Sent from my iPhone<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt">On 17 Jun 2021, at 13:54, Martin Bowes <<a href="mailto:martin.bowes@ndph.ox.ac.uk">martin.bowes@ndph.ox.ac.uk</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Can someone please explain this one…please use small words…<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">My Linux installation is an ISO-8859-1 charset. We have a table which has an nvarchar(20) column.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Now the Greek mu symbol is U+00B5, a capital-A with a circumflex is 00C2, The ¼ is U+00BC, and a capital-I with a circumflex is U+00CE.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">And in <u>terminal monitor</u> connection, how does this work…<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">select U&'\00c2', U&'\00b5',
<span style="background:yellow;mso-highlight:yellow">U&'\00c2\00b5'</span>\g</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">┌──────┬──────┬──────┐</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">│col1 │col2 │col3 │</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">├──────┼──────┼──────┤</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">│▒ │▒ │µ │</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">└──────┴──────┴──────┘</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">(1 row)</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">select u&'\00ce', u&'\00bc',
<span style="background:yellow;mso-highlight:yellow">u&'\00ce\00bc</span>'\g</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">┌──────┬──────┬──────┐</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">│col1 │col2 │col3 │</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">├──────┼──────┼──────┤</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">│▒ │▒ │μ │</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">└──────┴──────┴──────┘</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">(1 row)</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">So two weird codes have both combined to make a mu. I didn’t just invent these. I got them from two distinct data sets which were being compared.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">And they are clearly not the same thing.<o:p></o:p></p>
<p class="MsoPlainText"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">create table test(id integer1, a nvarchar(20));</span><o:p></o:p></p>
<p class="MsoPlainText"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">insert into test values (1, U&'\00c2\00b5'), (2, U&'\00ce\00bc');</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">select * from test\g</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">┌──────┬────────────────────────────────────────┐</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">│id │a │</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">├──────┼────────────────────────────────────────┤</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">│ 1│µ │</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">│ 2│μ │</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">└──────┴────────────────────────────────────────┘</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">(2 rows)</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">select a, count(1) from test group by a\g</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">┌────────────────────────────────────────┬─────────────┐</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">│a │col2 │</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">├────────────────────────────────────────┼─────────────┤</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">│µ │ 1│</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">│μ │ 1│</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">└────────────────────────────────────────┴─────────────┘</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Lucida Console",serif">(2 rows)</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">So could someone please explain this, and also how I can write some code which will say these two mu’s are the same thing.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Marty<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt">_______________________________________________<br>
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<p class="MsoNormal"><span style="font-size:12.0pt"><br>
<br>
<br>
</span><o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
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<p> <o:p></o:p></p>
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<p><o:p> </o:p></p>
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