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<p class="MsoNormal">Thanks <span lang="FR-CA" style="color:black;mso-fareast-language:EN-CA">
André </span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.5pt;color:#3A444A;mso-fareast-language:EN-AU">Senior Developer
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<p class="MsoNormal"><b><span style="font-size:10.5pt;color:#3A444A;mso-fareast-language:EN-AU">Fusion5 |</span></b><span style="font-size:10.5pt;color:#3A444A;mso-fareast-language:EN-AU"> Level 27, 570 Bourke Street, Melbourne, 3000, Australia<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:EN-AU">From:</span></b><span lang="EN-US" style="mso-fareast-language:EN-AU"> Laframboise, André (BAC/LAC) <andre.laframboise@canada.ca>
<br>
<b>Sent:</b> Monday, 29 July 2019 2:18 PM<br>
<b>To:</b> Darren Harvey <Darren.Harvey@fusion5.com.au>; info-ingres@lists.planetingres.org<br>
<b>Subject:</b> RE: Performance of Primary Key v Index<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-CA" style="color:#1F497D">Short answer is yes, or better. If you’re using the primary key, you’re avoiding the join the index table does to get the table data you’re extracting.</span><span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="color:#1F497D">(unless you added the data in the index table).</span><span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="color:#1F497D"> </span><span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA" style="color:black;mso-fareast-language:EN-CA">André Laframboise<br>
<br>
Conseiller Principal Base de Données, Direction générale de l'Innovation et du Dirigeant principal de l'information<br>
</span><span lang="EN-CA" style="color:black;mso-fareast-language:EN-CA"><a href="http://www.bac-lac.gc.ca/fra/Pages/bac-web.aspx"><span lang="FR-CA" style="color:blue">Bibliothèque et Archives Canada</span></a></span><span lang="FR-CA" style="color:black;mso-fareast-language:EN-CA">
/ Gouvernement du Canada <br>
</span><span lang="EN-CA" style="color:black;mso-fareast-language:EN-CA"><a href="mailto:andre.laframboise@canada.ca"><span lang="FR-CA" style="color:blue">andre.laframboise@canada.ca</span></a></span><span lang="FR-CA" style="color:black;mso-fareast-language:EN-CA">
/ Tél. : 613-298-1346<br>
<br>
Senior Database Advisor, Innovation and Chief Information Officer Branch<br>
</span><span lang="EN-CA" style="color:black;mso-fareast-language:EN-CA"><a href="http://www.bac-lac.gc.ca/eng/Pages/lac-web.aspx"><span lang="FR-CA" style="color:blue">Library and Archives Canada</span></a></span><span lang="FR-CA" style="color:black;mso-fareast-language:EN-CA">
/ Government of Canada<br>
</span><span lang="EN-CA" style="color:black;mso-fareast-language:EN-CA"><a href="mailto:andre.laframboise@canada.ca"><span lang="FR-CA" style="color:blue">andre.laframboise@canada.ca</span></a></span><span lang="FR-CA" style="color:black;mso-fareast-language:EN-CA">
/ Tel: 613-298-1346<br>
<br>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:EN-CA">From:</span></b><span lang="EN-US" style="mso-fareast-language:EN-CA">
<a href="mailto:info-ingres-bounces@lists.planetingres.org">info-ingres-bounces@lists.planetingres.org</a> <<a href="mailto:info-ingres-bounces@lists.planetingres.org">info-ingres-bounces@lists.planetingres.org</a>>
<b>On Behalf Of </b>Darren Harvey<br>
<b>Sent:</b> Sunday, July 28, 2019 7:29 PM<br>
<b>To:</b> <a href="mailto:info-ingres@lists.planetingres.org">info-ingres@lists.planetingres.org</a><br>
<b>Subject:</b> [Info-ingres] Performance of Primary Key v Index</span><span lang="EN-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"> <o:p></o:p></span></p>
<p class="MsoNormal">Hi All<span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal"> <span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal">If I have a table that has a Primary Key with 2 columns in the key, does the Primary Key provide the same performance for selecting data on those 2 columns as an Index would with the same 2 columns? <span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal"> <span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal">Thanks<span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal"> <span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal">Darren<span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal"> <span lang="EN-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.5pt;color:#3A444A;mso-fareast-language:EN-AU">M</span></b><span style="font-size:10.5pt;color:#3A444A;mso-fareast-language:EN-AU"> +61 400 398 188<br>
<b>P </b>+61 3 9922 5519 <br>
<b>Skype for Business ID</b> <a href="mailto:darren.harvey@fusion5.com.au">darren.harvey@fusion5.com.au</a>
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<p class="MsoNormal"><b><span style="font-size:10.5pt;color:#3A444A;mso-fareast-language:EN-AU">Fusion5 |</span></b><span style="font-size:10.5pt;color:#3A444A;mso-fareast-language:EN-AU"> Level 27, 570 Bourke Street, Melbourne, 3000, Australia</span><o:p></o:p></p>
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