luulinh90s's picture
update
8431e47
<html><head>
<style>
body { font-family: Arial, sans-serif; margin: 20px; }
h1 { text-align: center; }
.cot-title { color: blue; }
.pos-title { color: green; }
h2 { color: black; text-align: left; }
h3 { color: black; text-align: left; }
h4 { color: darkslategray; }
table { width: 100%; border-collapse: collapse; margin: 20px 0; }
table, th, td { border: 1px solid #ddd; padding: 8px; }
th { background-color: #f2f2f2; }
tr:nth-child(even) { background-color: #f9f9f9; }
.highlight { background-color: #ffffcc; }
.true { color: green; }
.false { color: red; }
.highlighted-cell { background-color: yellow; cursor: pointer; }
.step-title { background-color: #f1f1f1; color: #444; padding: 10px; margin: 10px 0; font-size: 18px; border-left: 4px solid #888; }
.step { display: block; }
</style>
</head><body>
<hr/>
<h3><span>Statement:</span> in lukáš melich 's last two competitions he threw an average distance of 78.27 m</h3>
<h3>Input Table: lukáš melich</h3>
<div class="step">
<div class="step">
<div class="step-title">Step 1: Order the table by 'year' in descending order.</div>
<div class="content" id="step-1">
<table>
<tr>
<td>year</td>
<td>competition</td>
<td>venue</td>
<td>position</td>
<td>notes</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">1998-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">world junior championships</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">annecy , france</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">10th</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">61.51 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">1999-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">european junior championships</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">riga , latvia</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">5th</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">64.20 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">2001-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">european u23 championships</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">amsterdam , netherlands</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">11th</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">66.41 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">2003-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">universiade</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">daegu , south korea</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">4th</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">71.26 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">2005-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">world championships</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">helsinki , finland</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">14th</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">74.53 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">2006-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">european championships</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">gothenburg , sweden</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">15th</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">73.77 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">2008-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">olympic games</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">beijing , pr china</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">29th</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">70.56 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">2009-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">world championships</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">berlin , germany</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">14th</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">74.47 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">2012-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">olympic games</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">london , great britain</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">6th</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">77.17 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">2013-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">world championships</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">moscow , russia</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">3rd</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">79.36 m</span></td>
</tr>
</table>
</div>
<hr/>
<div class="step">
<div class="step-title">Step 2: Select the last two rows from the ordered table.</div>
<div class="content" id="step-0">
<table>
<tr>
<td>year</td>
<td>competition</td>
<td>venue</td>
<td>position</td>
<td>notes</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">2013-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">world championships</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">moscow , russia</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">3rd</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">79.36 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">2012-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">olympic games</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">london , great britain</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">6th</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">77.17 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">2009-01-01</span></td>
<td>world championships</td>
<td>berlin , germany</td>
<td>14th</td>
<td>74.47 m</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">2008-01-01</span></td>
<td>olympic games</td>
<td>beijing , pr china</td>
<td>29th</td>
<td>70.56 m</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">2006-01-01</span></td>
<td>european championships</td>
<td>gothenburg , sweden</td>
<td>15th</td>
<td>73.77 m</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">2005-01-01</span></td>
<td>world championships</td>
<td>helsinki , finland</td>
<td>14th</td>
<td>74.53 m</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">2003-01-01</span></td>
<td>universiade</td>
<td>daegu , south korea</td>
<td>4th</td>
<td>71.26 m</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">2001-01-01</span></td>
<td>european u23 championships</td>
<td>amsterdam , netherlands</td>
<td>11th</td>
<td>66.41 m</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">1999-01-01</span></td>
<td>european junior championships</td>
<td>riga , latvia</td>
<td>5th</td>
<td>64.20 m</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">1998-01-01</span></td>
<td>world junior championships</td>
<td>annecy , france</td>
<td>10th</td>
<td>61.51 m</td>
</tr>
</table>
</div>
</div>
<hr/>
<div class="step">
<div class="step-title">Step 3: Extract the numerical distance from the 'notes' column then add column 'distance' to the selected rows.</div>
<div class="content" id="step-1">
<table>
<tr>
<td>year</td>
<td>competition</td>
<td>venue</td>
<td>position</td>
<td>notes</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">2013-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">world championships</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">moscow , russia</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">3rd</span></td>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">79.36 m</span></td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">2012-01-01</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">olympic games</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">london , great britain</span></td>
<td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">6th</span></td>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">77.17 m</span></td>
</tr>
</table>
</div>
</div>
<hr/>
<div class="step">
<div class="step-title">Step 4: Calculate the average distance of the selected rows.</div>
<div class="content" id="step-2">
<table>
<tr>
<td>year</td>
<td>competition</td>
<td>venue</td>
<td>position</td>
<td>notes</td>
<td>distance</td>
</tr>
<tr>
<td>2013-01-01</td>
<td>world championships</td>
<td>moscow , russia</td>
<td>3rd</td>
<td>79.36 m</td>
<td>79.36</td>
</tr>
<tr>
<td>2012-01-01</td>
<td>olympic games</td>
<td>london , great britain</td>
<td>6th</td>
<td>77.17 m</td>
<td>77.17</td>
</tr>
</table>
</div>
</div>
<hr/>
<div class="step">
<div class="step-title">Step 5: Use a `CASE` statement to return TRUE if the average distance is equal to 78.27 m, otherwise return FALSE.</div>
<div class="content" id="step-3">
<table>
<tr>
<td>avg_distance</td>
</tr>
<tr>
<td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">78.265</span></td>
</tr>
</table>
</div>
</div>
<hr/>
</div>
</div>
<hr/>
</body></html>