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571 lines
22 KiB
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<title>CSE 4/562</title>
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<meta name="description" content="CSE 4/562">
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<meta name="author" content="Oliver Kennedy">
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<body>
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<div class="reveal">
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<!-- Any Talk-Specific Header Content Goes Here -->
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CSE 4/562 - Database Systems
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</div>
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<div class="slides">
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<section>
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<h1>Intro</h1>
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<h3>CSE 4/562 – Database Systems</h3>
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<h5>January 28, 2019</h5>
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</section>
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<section>
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<section>
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<h2>Why Are Databases Awesome?</h2>
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</section>
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<section>
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<h2>They're Everywhere</h2>
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<img src="graphics/Clipart/SqlitePhone.png">
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</section>
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<section>
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<h2>$$$</h2>
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<table class="plainrowheads" style="text-align:center; font-size: small;">
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<thead><tr>
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<th colspan="2">Rank</th>
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<th>Organization</th>
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<th>Sales (B$)</th>
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<th>FY</th>
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<th>Market cap (B$)</th>
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<th>Headquarters</th>
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</tr></thead><tbody>
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<tr class="fragment highlight-blue" data-fragment-index="1">
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<td>1</td><td><img style="margin: 0px;" alt="United States" src="../cse4562sp2018/graphics/2018-01-29-23px-Flag_of_the_United_States.svg.png" width="23" height="12"/></td><td>Microsoft</td><td>86.6</td><td>2017</td><td>601</td><td>Redmond, WA, US</td>
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</tr>
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<tr class="fragment highlight-blue" data-fragment-index="1">
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<td>2</td><td><img style="margin: 0px;" alt="United States" src="../cse4562sp2018/graphics/2018-01-29-23px-Flag_of_the_United_States.svg.png" width="23" height="12"/></td><td>Oracle</td><td>37.2</td><td>2017</td><td>205</td><td>Redwood City, CA, US</td>
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</tr>
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<tr class="fragment highlight-blue" data-fragment-index="1">
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<td>3</td><td><img style="margin: 0px;" alt="Germany" src="../cse4562sp2018/graphics/2018-01-29-23px-Flag_of_Germany.svg.png" width="23" height="14"/></td><td>SAP</td><td>23.2</td><td>2017</td><td>117</td><td>Walldorf, Germany</td>
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</tr>
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<tr class="fragment highlight-blue" data-fragment-index="1">
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<td>4</td><td><img style="margin: 0px;" alt="United States" src="../cse4562sp2018/graphics/2018-01-29-23px-Flag_of_the_United_States.svg.png" width="23" height="12"/></td><td>Salesforce.com</td><td>8.4</td><td>2017</td><td>69</td><td>San Francisco, CA, US</td>
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</tr>
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<tr>
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<td>5</td><td><img style="margin: 0px;" alt="United States" src="../cse4562sp2018/graphics/2018-01-29-23px-Flag_of_the_United_States.svg.png" width="23" height="12"/></td><td>VMware</td><td>6.7</td><td>2017</td><td>48</td><td>Palo Alto, CA, US</td>
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</tr>
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<tr class="fragment highlight-blue" data-fragment-index="1">
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<td>6</td><td><img style="margin: 0px;" alt="United States" src="../cse4562sp2018/graphics/2018-01-29-23px-Flag_of_the_United_States.svg.png" width="23" height="12"/></td><td>Fiserv</td><td>5.3</td><td>2017</td><td>26</td><td>Brookfield, WI, US</td>
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</tr>
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<tr>
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<td>7</td><td><img style="margin: 0px;" alt="United States" src="../cse4562sp2018/graphics/2018-01-29-23px-Flag_of_the_United_States.svg.png" width="23" height="12"/></td><td>Adobe Systems</td><td>5</td><td>2017</td><td>84</td><td>San Jose, CA, US</td>
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</tr>
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<tr>
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<td>8</td><td><img style="margin: 0px;" alt="United States" src="../cse4562sp2018/graphics/2018-01-29-23px-Flag_of_the_United_States.svg.png" width="23" height="12"/></td><td>Symantec</td><td>5.4</td><td>2017</td><td>19</td><td>Mountain View, CA, US</td>
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</tr>
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<tr class="fragment highlight-blue" data-fragment-index="1">
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<td>9</td><td><img style="margin: 0px;" alt="Spain" src="../cse4562sp2018/graphics/2018-01-29-23px-Flag_of_Spain.svg.png" width="23" height="15"/></td><td>Amadeus IT Holdings</td><td>4.3</td><td>2017</td><td>25</td><td>Madrid, Spain</td>
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</tr>
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</tbody><tfoot></tfoot>
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</table>
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<p class="fragment" data-fragment-index="1">5 of 9 Forbes Top Software Companies<br/>Have a Focus on Data Management Systems</p>
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<imagecredits><a href="https://en.wikipedia.org/wiki/List_of_the_largest_software_companies">(Source wikipedia.org)</a></imagecredits>
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</section>
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<section>
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<h2>Interesting Problems</h2>
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<img src="../cse4562sp2018/graphics/2018-01-29-db_interesting.svg" />
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</section>
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</section>
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<!-- ================================================================ -->
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<section>
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<section>
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<h1>What is "Databases"?
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</section>
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<section>
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<h3 style="padding-bottom: 60px;">How do we ask and answer questions about data?</h3>
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<h3>How do we manipulate and persist data?</h3>
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</section>
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<section>
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<h3>Databases</h3>
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<table>
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<tr>
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<td style="font-weight: bold; vertical-align: middle;">Techniques</td>
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<td>
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<p class="fragment">Data Modeling</p>
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<p class="fragment">Cost-Based Optimization</p>
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</td>
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</tr>
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<tr>
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<td style="font-weight: bold; vertical-align: middle;">Recipes</td>
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<td>
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<p class="fragment">Join Algorithms</p>
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<p class="fragment">Index Data Structures</p>
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</td>
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</tr>
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<tr>
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<td style="font-weight: bold; vertical-align: middle;">Knowledge</td>
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<td>
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<p class="fragment">The Memory Hierarchy</p>
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<p class="fragment">Data Consistency</p>
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</td>
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</tr>
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</table>
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</section>
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<section>
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<h2>Which Tools To Use</h2>
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<h2 class="fragment">And When?</h2>
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</section>
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<section>
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<h3>Template for 90% of this class</h3>
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<p style="font-size: larger;">What is the best, correct technique for task <b>X</b>, when <b>Y</b> is true?</p>
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<ol style="margin-top: 20px;">
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<li class="fragment">How do you define <i>Correct</i> and <i>Best</i>?</li>
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<li class="fragment">What correct alternatives are available?</li>
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<li class="fragment">How do you find the best available alternative</li>
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</ol>
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</section>
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</section>
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<!-- ================================================================ -->
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<section>
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<section>
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<h2>General Course Information</h2>
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</section>
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<section>
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<h3>Expectations</h3>
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<dl>
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<div class="fragment">
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<dt>Algorithms / Data Structures</dt>
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<dd>$O(\cdot)$ Analysis, Sort Algos, Trees, Hash Tables</dd>
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</div>
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<div class="fragment">
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<dt>How to <i>use</i> a database</dt>
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<dd>CSE 4/560 (or equivalent)</dd>
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</div>
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<div class="fragment">
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<dt>Java (or Scala)</dt>
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<dd>This means actual programming experience</dd>
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<dd class="fragment">(C++, C# or similar is usually good enough)</dd>
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</div>
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</dl>
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</section>
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<section>
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<h3>Me</h3>
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Oliver Kennedy
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<h3 style="padding-top: 50px;">TAs</h3>
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<span style="margin: 20px;">Vicky Zheng</span>
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<span style="margin: 20px;">Qiuling Suo</span>
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<h3 style="padding-top: 50px;">Ninjas</h3>
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<span style="margin: 20px;">William Spoth</span>
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<span style="margin: 20px;">Darshana Balakrishnan</span>
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<span style="margin: 20px;">Carl Nuessle</span>
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</section>
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<section>
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<h3>Syllabus and Projects</h3>
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<p><a href="https://odin.cse.buffalo.edu/teaching/cse-462/">https://odin.cse.buffalo.edu/teaching/cse-462/</a></p>
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<p><a href="https://odin.cse.buffalo.edu/teaching/cse-562/">https://odin.cse.buffalo.edu/teaching/cse-562/</a></p>
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<p style="font-size: small">(same link)</p>
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<h3 style="margin-top: 50px;">Course Forum</h3>
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<p><a href="https://piazza.com/buffalo/spring2018/cse4562/home">https://piazza.com/buffalo/spring2019/cse4562/home</a></p>
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</section>
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<section>
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<table>
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<tr>
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<td>
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<img src="graphics/Books/DBSystemsHardcover.jpg" height="200px">
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</td>
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<td>
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<img src="graphics/Books/DBSystemsSoftcover.jpg" height="200px">
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</td>
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</tr>
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<tr class="fragment">
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<td>$150</td>
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<td>$50</td>
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</tr>
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<tr class="fragment">
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<td>Index<br/>ToC</td>
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<td>No Index<br/>ToC Summary</td>
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</tr>
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</table>
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</section>
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<section>
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<h3>Course Structure</h3>
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<dl>
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<dt>Concepts (50% of Grade)</dt>
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<dd><ul class="tight">
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<li>Homework (10%; ~12 Assignments, Drop any 4)</li>
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<li><b>March 13</b>: Midterm (20%<span class="fragment" data-fragment-index="1"> or 15%</span>)</li>
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<li><b>May 17?</b>: Comprehensive Final (20%<span class="fragment" data-fragment-index="1"> or 25%</span>)</li>
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</ul></dd>
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<dt>Practicum (50% of Grade)</dt>
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<dd><ul class="tight">
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<li>Build a Relational Query Engine</li>
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<li>3-Person Group Project</li>
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<li>4 Checkpoints (+ 5 free points for Checkpoint 0)</li>
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</ul></dd>
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</dl>
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</section>
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</section>
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<!-- ================================================================ -->
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<section>
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<section>
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<h3>Embedded Databases</h3>
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<ul>
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<li>SQLite (In your browser, computer, phone, fridge...)</li>
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<li>Simple, Easy-To-Use Declarative Data Management</li>
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<li>Critical for future tech: Part of Mobile, IoT, Web</li>
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</ul>
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<p class="fragment"><b>Your Startup:</b> Build the next great <i>Embedded Database</i></p>
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</section>
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<section>
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<h3>We give you...</h3>
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<p style="font-size: smaller;">Data (CSV Files)</p>
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<p style="font-size: smaller;">Schema Information (CREATE TABLE)</p>
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<p style="font-size: smaller;">Questions (SQL Queries)</p>
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<div class="fragment">
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<hr/>
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<h3>You give us...</h3>
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<p style="font-size: smaller;">Answers</p>
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<p style="font-size: smaller;" class="fragment">(really really fast)</p>
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</div>
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</section>
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<section>
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<h3>Real World Challenge</h3>
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<p>You get graded on your code's...</p>
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<dl>
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<dt>Correctness</dt>
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<dd>~1/3 credit for getting the right answer.</dd>
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<dt>Performance</dt>
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<dd>~2/3 credit for getting it reasonably fast.</dd>
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</dl>
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</section>
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<section>
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<svg data-src="graphics/2019-01-28-project-overview.svg" class="stretch"/>
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</section>
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<section>
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<h3>Checkpoint 0: "Hello World"</h3>
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<p style="font-size: smaller;">5/50 pts</p>
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<ul>
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<li>Form groups</li>
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<li>Submit a simple Java program</li>
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<li>Make sure that the submission workflow works for you.</li>
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</ul>
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</section>
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<section>
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<h3>Checkpoint 1: "Get it Working"</h3>
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<p style="font-size: smaller;">10/50 pts</p>
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<ul>
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<li>Translate SQL to Relational Algebra</li>
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<li>Load CSV Files</li>
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<li>Run Basic Select, Project, Join Queries</li>
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</ul>
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</section>
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<section>
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<h3>Checkpoint 2: "Big Data"</h3>
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<p style="font-size: smaller;">10/50 pts</p>
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<ul>
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<li>Order By</li>
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<li>Limit</li>
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<li>Nested Queries</li>
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<li>Aggregation</li>
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<li>Too much data for memory</li>
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</ul>
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</section>
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<section>
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<h3>Checkpoint 3: "Precomputation"</h3>
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<p style="font-size: smaller;">15/50 pts</p>
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<ul>
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<li>You get a few minutes to pre-compute</li>
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<li>Load data</li>
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<li>Cache views</li>
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<li>Build indexes</li>
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</ul>
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</section>
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<section>
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<h3>Checkpoint 4: "The Real World"</h3>
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<p style="font-size: smaller;">10/50 pts</p>
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<ul>
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<li>We give you a Buffer Manager</li>
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<li>Dynamic, skewed workload</li>
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</ul>
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</section>
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</section>
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|
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<!-- ================================================================ -->
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<section>
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<section>
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<h3>Ways to Fail</h3>
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||
<ul>
|
||
<li>Start your project at the last minute</li>
|
||
<li>Don’t go to office hours</li>
|
||
<li>Don’t ask questions on Piazza</li>
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<li>Wait until the deadline to submit for the first time</li>
|
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<li class="fragment">Cheat</li>
|
||
</ul>
|
||
</section>
|
||
|
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<section>
|
||
<img src="graphics/Clipart/Graargh.png">
|
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</section>
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||
|
||
<section>
|
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<h3>Academic Integrity</h3>
|
||
<p>Cheating is submitting any work that you did not perform by yourself as if you did.</p>
|
||
</section>
|
||
<section>
|
||
<dl>
|
||
<dt>References (when cited)</dt>
|
||
<dd>Wikipedia, Wikibooks (or similar): <span style="color: #00882B; font-weight: bold;">OK</span></dd>
|
||
|
||
<dt>Public Code</dt>
|
||
<dd>Stack Exchange (or similar): <span style="color: #C82506; font-weight: bold;">Not OK</span></dd>
|
||
|
||
<dt><i>Discussing</i> concepts/ideas with classmates</dt>
|
||
<dd>“A hash index has O(1) lookups”: <span style="color: #00882B; font-weight: bold;">OK</span> <span style="color: #C82506; font-size: small;">(except during exams 😇 )</span></dd>
|
||
|
||
<dt><i>Sharing</i> code or answers with anyone</dt>
|
||
<dd>“Just have a look at how I implemented it”: <span style="color: #C82506; font-weight: bold;">NOT OK</span></dd>
|
||
<dd>For-hire code: <span style="color: #C82506; font-weight: bold;">NOT OK</span></dd>
|
||
</dl>
|
||
<p>
|
||
</section>
|
||
|
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<section>
|
||
<h3>MOSS</h3>
|
||
<img src="../cse4562sp2018/graphics/2018-01-29-MOSS.png" height="400px"/>
|
||
</section>
|
||
|
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<section>
|
||
<h3>MOSS</h3>
|
||
<img src="../cse4562sp2018/graphics/2018-01-29-MOSSDetails.png" height="400px"/>
|
||
</section>
|
||
|
||
<section>
|
||
<dl>
|
||
<dt>Zero Tolerance</dt>
|
||
<dd>If I catch you submitting someone else’s code (including pay-for-code services), <span style="font-weight: bold; text-decoration: underline;">you will fail the class</span>.</dd>
|
||
|
||
<dt>Group Responsibility</dt>
|
||
<dd>If your teammate cheats on a group project, <span style="font-weight: bold; text-decoration: underline;">the entire group will be penalized.</span></dd>
|
||
|
||
<dt>Share Code, Share Blame</dt>
|
||
<dd>If someone else submits your code as their own, <span style="font-weight: bold; text-decoration: underline;">you will be penalized as well.</span></dd>
|
||
</dl>
|
||
</section>
|
||
|
||
<section>
|
||
<h3>Questions/Concerns?</h3>
|
||
</section>
|
||
</section>
|
||
|
||
<!-- ================================================================ -->
|
||
|
||
<section>
|
||
<section>
|
||
<h2>What does a Data Management System Do?</h2>
|
||
</section>
|
||
|
||
<section>
|
||
<dl>
|
||
<dt>Analysis: Answering user-provided questions about data</dt>
|
||
<dd class="fragment" data-fragment-index="1">What kind of tools can we give end-users? <ul class="tight">
|
||
<li class="fragment">Declarative Languages</li>
|
||
<li class="fragment">Organizational Datastructures (e.g., Indexes)</li>
|
||
</ul></dd>
|
||
|
||
<dt>Manipulation: Safely persisting and sharing data updates</dt>
|
||
<dd class="fragment" data-fragment-index="1">What kind of tools can we give end-users?<ul class="tight">
|
||
<li class="fragment">Consistency Primitives</li>
|
||
<li class="fragment">Data Validation Primitives</li>
|
||
</ul></dd>
|
||
</dl>
|
||
</section>
|
||
|
||
<section>
|
||
<svg data-src="../cse4562sp2018/graphics/2018-01-29-fs_vs_db.svg" />
|
||
</section>
|
||
|
||
<section>
|
||
<h2>So let's talk structure...</h2>
|
||
</section>
|
||
|
||
<section>
|
||
<dl style="font-size: smaller;">
|
||
<dt>Primitive</dt>
|
||
<dd>Basic building blocks like Int, Float, Char, String</dd>
|
||
<dt>Tuple</dt>
|
||
<dd>Several ‘fields’ of different types. (N-Tuple = N fields)</dd>
|
||
<dd>A Tuple has a ‘schema’ defining each field</dd>
|
||
<dt>Set</dt>
|
||
<dd>A collection of unique records, all of the same type</dd>
|
||
<dt>Bag</dt>
|
||
<dd>An unordered collection of records, all of the same type</dd>
|
||
<dt>List</dt>
|
||
<dd>An ordered collection of records, all of the same type</dd>
|
||
</dl>
|
||
</section>
|
||
|
||
<section>
|
||
<svg data-src="../cse4562sp2018/graphics/2018-01-29-rel-schemas.svg" />
|
||
</section>
|
||
|
||
<section>
|
||
<p>
|
||
Your data is currently an <i>Unordered Set</i> <br/>
|
||
of <i>Tuples</i> with 100 fields each.
|
||
</p>
|
||
|
||
<p class="fragment" style="margin-top: 50px;">
|
||
Tomorrow, you’ll be repeatedly asked for <i>1 specific attribute</i><br/>
|
||
of <i>5 specific rows</i> identified by the <i>first attribute</i>
|
||
</p>
|
||
|
||
<h3 class="fragment">Can you do better?</p>
|
||
</section>
|
||
|
||
<section>
|
||
<p><b>Better Idea</b>: Rewrite data into a 99-Tuple of Maps keyed on the 1st attribute</p>
|
||
<p class="fragment" style="margin-top: 50px;">This representation is <u>equivalent</u> and <u>better</u> for your needs.</p>
|
||
|
||
<p class="fragment" style="margin-top: 50px; font-weight: bold;">Declarative specifications make it easier to find equivalences.</p>
|
||
</section>
|
||
</section>
|
||
|
||
</div></div>
|
||
|
||
<script src="../reveal.js-3.6.0/lib/js/head.min.js"></script>
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<script src="../reveal.js-3.6.0/js/reveal.js"></script>
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transition: 'fade', // none/fade/slide/convex/concave/zoom
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