I've normalised myself with a jolly nice Chardonnay, and my solution to the question is at <a href="http://www.vceit.com/postmortems/2012ita/ita2012.htm">http://www.vceit.com/postmortems/2012ita/ita2012.htm</a><div>I've yet to proofread it for howlers, but it's basically finished.<br>
</div><div><br></div><div>And the normalisation question was a pig to work on. It took me 30 minutes, with one or two false starts, to explain it halfway clearly. And I fear even now it's not strictly accurate.</div>
<div>
Dog only know how even the best kids coped.</div><div class="gmail_extra"><br><br><div class="gmail_quote">On 14 November 2012 10:35, Mark Scott <span dir="ltr"><<a href="mailto:msc@luther.vic.edu.au" target="_blank">msc@luther.vic.edu.au</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-AU" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt">Peter <u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I would have separated the DB into three tables as part of 2NF and then got rid of the Total fee calculation field as 3NF<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">And students should at least show the completed Relationship Diagram.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Tricky part is explaining how each (do they mean separately?) normal form ensures the integrity of data.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">But I will wait and see what the gurus have to say (you out there Mark K?)<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">thanks<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt">Mark Scott<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt">Luther College<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><u></u> <u></u></span></p><p class="MsoNormal" style="margin-left:36.0pt"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:itapps-bounces@edulists.com.au" target="_blank">itapps-bounces@edulists.com.au</a> [mailto:<a href="mailto:itapps-bounces@edulists.com.au" target="_blank">itapps-bounces@edulists.com.au</a>] <b>On Behalf Of </b>Peter Langham<br>
<b>Sent:</b> Wednesday, 14 November 2012 10:05 AM<br><b>To:</b> Year 12 IT Applications Teachers' Mailing List<br><b>Subject:</b> Re: [Year 12 IT Apps] NINE mark question??<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:36.0pt">
<u></u> <u></u></p><div><p class="MsoNormal" style="margin-left:36.0pt">Here's my attempt at the normalisation question<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt"> <u></u><u></u></p></div>
<div><p class="MsoNormal" style="margin-left:36.0pt">1NF - No lists of data in any cell. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">Divide the data in any of the memberName, memberAddress, driverName fields. <u></u><u></u></p>
</div><div><p class="MsoNormal" style="margin-left:36.0pt">memberAddress becomes: memberAddress becomes memberAddress and memberPostcode<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">E.g. <u></u><u></u></p>
</div><div><p class="MsoNormal" style="margin-left:36.0pt">memberAddress : 2 Hill St<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">memberSuburb : Richmond<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">
This allows for more specific queries. E.g. Filtering data by Suburb.<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt"> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">
2NF - each non-key field must be fully dependent on the key<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">yearsWorked is dependent on driverName. Make a seperate table where driverName is the Primary Key and it is a Foreign Key in the memberName table.<u></u><u></u></p>
</div><div><p class="MsoNormal" style="margin-left:36.0pt">Table 1: memberName, memberAddress, driverName (foreign key), carRate($), totalFee($)<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">
Table 2: driverName (primary key), yearsWorked<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">This ensures data integrity as the yearsWorked data would only need to be updated in the one cell now instead of multiple cells.<u></u><u></u></p>
</div><div><p class="MsoNormal" style="margin-left:36.0pt"> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">3NF - every field in a table must relate directly to the primary key<br>carRate($) is dependent on the size of the car. I'd add a foreign key field to table1 carSize which would become a primary key field in the third table.<u></u><u></u></p>
</div><div><div><p class="MsoNormal" style="margin-left:36.0pt">Table 1: memberName, memberAddress, driverName (foreign key), carSize (foreign key) <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">
Table 2: driverName (primary key), yearsWorked<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">Table 3: carSize, carRate($)<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">
<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">This leaves us with what I beleive should be a calculated field, totalFee($).<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">
totalFee($): [yearsWorked]*[carRate($)]<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt"> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">I may have 2NF and 3NF in the wrong order.<u></u><u></u></p>
</div><div><p class="MsoNormal" style="margin-left:36.0pt"> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">Unfortunately, I didn't go over this in a lot of depth with my students, I expected that they would have the choice of which Normal Form they solved for, like the VCAA sample exam so we focused on 1NF more heavily than the other two normal forms.<u></u><u></u></p>
</div><div><p class="MsoNormal" style="margin-left:36.0pt"> <u></u><u></u></p></div></div><div><p class="MsoNormal" style="margin-left:36.0pt">Peter Langham<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">
Narre Warren South P-12<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt"> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36.0pt">On Wed, Nov 14, 2012 at 9:30 AM, Mark Scott <<a href="mailto:msc@luther.vic.edu.au" target="_blank">msc@luther.vic.edu.au</a>> wrote:<u></u><u></u></p>
<div><div><p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt"> </span><u></u><u></u></p><p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt">Mark</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt"> </span><u></u><u></u></p><p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt">It will be Q9 (the Normalisation one) that will be the one most poorly answered.</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt"> </span><u></u><u></u></p><p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt">I am looking forward to seeing your solution for that one.</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt"> </span><u></u><u></u></p><p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt;font-family:Wingdings">J</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt"> </span><u></u><u></u></p><p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt">Mark Scott<br>Luther College</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt"> </span><u></u><u></u></p><table border="0" cellspacing="0" cellpadding="0" width="400" style="width:300.0pt;margin-left:36.0pt"><tbody><tr><td style="padding:0cm 0cm 0cm 0cm">
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<br clear="all"><u></u><u></u></p><p class="MsoNormal" style="margin-left:36.0pt"><u></u> <u></u></p><p class="MsoNormal" style="margin-left:72.0pt"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:itapps-bounces@edulists.com.au" target="_blank">itapps-bounces@edulists.com.au</a> [mailto:<a href="mailto:itapps-bounces@edulists.com.au" target="_blank">itapps-bounces@edulists.com.au</a>] <b>On Behalf Of </b>Mark KELLY<br>
<b>Sent:</b> Wednesday, 14 November 2012 9:15 AM<br><b>To:</b> Year 12 IT Applications Teachers' Mailing List<br><b>Subject:</b> [Year 12 IT Apps] NINE mark question??</span><u></u><u></u></p><div><div><p class="MsoNormal" style="margin-left:72.0pt">
<u></u><u></u></p><p class="MsoNormal" style="margin-left:72.0pt">I wonder what the logic was behind changing the eight mark question into a nine mark question.<u></u><u></u></p><div><p class="MsoNormal" style="margin-left:72.0pt">
<u></u><u></u></p><div><p class="MsoNormal" style="margin-left:72.0pt">Was it something like, "Let's take the question that was most poorly answered last year and make it even more difficult." ?<br clear="all">
<u></u><u></u></p><div><p class="MsoNormal" style="margin-left:72.0pt"> <u></u><u></u></p></div><p class="MsoNormal" style="margin-bottom:12.0pt;margin-left:72.0pt">-- <br>Mark Kelly - <a href="mailto:kel@mckinnonsc.vic.edu.au" target="_blank">kel@mckinnonsc.vic.edu.au</a><br>
Manager of ICT, Reporting, IT Learning Area<br>McKinnon Secondary College, McKinnon Rd, McKinnon 3204, Victoria, Australia<br>Phone: <a href="tel:%2B613%208520%209085" target="_blank">+613 8520 9085</a>, Fax <a href="tel:%2B613%209578%209253" target="_blank">+613 9578 9253</a><br>
VCE IT Lecture Notes: <a href="http://vceit.com/" target="_blank">http://vceit.com</a><br>Moderator: <a href="http://edulists.com.au/itapps/index.htm" target="_blank">IT Applications Edulist</a><br>Visit Diigo links for <a href="http://groups.diigo.com/group/vce-info-tech" target="_blank">ITA</a> and <a href="http://groups.diigo.com/group/vce-sd" target="_blank">SD</a><br>
--<br>My personal best for the 100 metre sprint is 11.9 metres.<br><br><u></u><u></u></p></div></div></div></div></div></div><p class="MsoNormal" style="margin-left:36.0pt"><br>_______________________________________________<br>
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<a href="http://www.swinburne.edu.au/ict/schools" target="_blank">http://www.swinburne.edu.au/ict/schools</a> - Swinburne University<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Mark Kelly - <a href="mailto:kel@mckinnonsc.vic.edu.au" target="_blank">kel@mckinnonsc.vic.edu.au</a><br>
Manager of ICT, Reporting, IT Learning Area<br>McKinnon Secondary College, McKinnon Rd, McKinnon 3204, Victoria, Australia<br>Phone: +613 8520 9085, Fax +613 9578 9253<br>VCE IT Lecture Notes: <a href="http://vceit.com" target="_blank">http://vceit.com</a><br>
Moderator: <a href="http://edulists.com.au/itapps/index.htm" target="_blank">IT Applications Edulist</a><br>Visit Diigo links for <a href="http://groups.diigo.com/group/vce-info-tech" target="_blank">ITA</a> and <a href="http://groups.diigo.com/group/vce-sd" target="_blank">SD</a><br>
--<br>My personal best for the 100 metre sprint is 11.9 metres.<br><br><br><br>
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