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| <hr/> | |
| <h3><span>Statement:</span> in 1962 , the vfl began in july</h3> | |
| <h3>Input Table: 1962 vfl season</h3> | |
| <div class="step"> | |
| <div class="step"> | |
| <div class="step-title">Step 1: Extract the numerical month from the 'date' column then add column 'month' to existing table.</div> | |
| <div class="content" id="step-1"> | |
| <table> | |
| <tr> | |
| <td>home_team</td> | |
| <td>home_team_score</td> | |
| <td>away_team</td> | |
| <td>away_team_score</td> | |
| <td>venue</td> | |
| <td>crowd</td> | |
| <td>date</td> | |
| </tr> | |
| <tr> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">melbourne</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">11.18 (84)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">st kilda</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">11.6 (72)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">mcg</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">48952</span></td> | |
| <td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">1962-06-23</span></td> | |
| </tr> | |
| <tr> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">essendon</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">15.17 (107)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">geelong</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">10.7 (67)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">windy hill</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">35000</span></td> | |
| <td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">1962-06-23</span></td> | |
| </tr> | |
| <tr> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">collingwood</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">10.14 (74)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">fitzroy</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">9.11 (65)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">victoria park</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">26488</span></td> | |
| <td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">1962-06-23</span></td> | |
| </tr> | |
| <tr> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">carlton</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">12.9 (81)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">footscray</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">9.10 (64)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">princes park</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">32400</span></td> | |
| <td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">1962-06-23</span></td> | |
| </tr> | |
| <tr> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">south melbourne</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">10.13 (73)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">richmond</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">11.13 (79)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">lake oval</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">17000</span></td> | |
| <td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">1962-06-23</span></td> | |
| </tr> | |
| <tr> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">north melbourne</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">10.8 (68)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">hawthorn</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">10.7 (67)</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">arden street oval</span></td> | |
| <td><span class="highlighted-cell" style="background-color:yellow;" title="Used in transformation">8470</span></td> | |
| <td><span class="highlighted-cell" style="background-color:#90EE90;" title="Used in transformation">1962-06-23</span></td> | |
| </tr> | |
| </table> | |
| </div> | |
| <hr/> | |
| <div class="step"> | |
| <div class="step-title">Step 2: Select rows where 'month' is July.</div> | |
| <div class="content" id="step-0"> | |
| <table> | |
| <tr> | |
| <td>home_team</td> | |
| <td>home_team_score</td> | |
| <td>away_team</td> | |
| <td>away_team_score</td> | |
| <td>venue</td> | |
| <td>crowd</td> | |
| <td>date</td> | |
| <td>month</td> | |
| </tr> | |
| <tr> | |
| <td>melbourne</td> | |
| <td>11.18 (84)</td> | |
| <td>st kilda</td> | |
| <td>11.6 (72)</td> | |
| <td>mcg</td> | |
| <td>48952</td> | |
| <td>1962-06-23</td> | |
| <td>6</td> | |
| </tr> | |
| <tr> | |
| <td>essendon</td> | |
| <td>15.17 (107)</td> | |
| <td>geelong</td> | |
| <td>10.7 (67)</td> | |
| <td>windy hill</td> | |
| <td>35000</td> | |
| <td>1962-06-23</td> | |
| <td>6</td> | |
| </tr> | |
| <tr> | |
| <td>collingwood</td> | |
| <td>10.14 (74)</td> | |
| <td>fitzroy</td> | |
| <td>9.11 (65)</td> | |
| <td>victoria park</td> | |
| <td>26488</td> | |
| <td>1962-06-23</td> | |
| <td>6</td> | |
| </tr> | |
| <tr> | |
| <td>carlton</td> | |
| <td>12.9 (81)</td> | |
| <td>footscray</td> | |
| <td>9.10 (64)</td> | |
| <td>princes park</td> | |
| <td>32400</td> | |
| <td>1962-06-23</td> | |
| <td>6</td> | |
| </tr> | |
| <tr> | |
| <td>south melbourne</td> | |
| <td>10.13 (73)</td> | |
| <td>richmond</td> | |
| <td>11.13 (79)</td> | |
| <td>lake oval</td> | |
| <td>17000</td> | |
| <td>1962-06-23</td> | |
| <td>6</td> | |
| </tr> | |
| <tr> | |
| <td>north melbourne</td> | |
| <td>10.8 (68)</td> | |
| <td>hawthorn</td> | |
| <td>10.7 (67)</td> | |
| <td>arden street oval</td> | |
| <td>8470</td> | |
| <td>1962-06-23</td> | |
| <td>6</td> | |
| </tr> | |
| </table> | |
| </div> | |
| </div> | |
| <hr/> | |
| <div class="step"> | |
| <div class="step-title">Step 3: Use a `CASE` statement to return TRUE if the number of rows is equal to 0, otherwise return FALSE.</div> | |
| <div class="content" id="step-1"> | |
| <table> | |
| <tr> | |
| <td>home_team</td> | |
| <td>home_team_score</td> | |
| <td>away_team</td> | |
| <td>away_team_score</td> | |
| <td>venue</td> | |
| <td>crowd</td> | |
| <td>date</td> | |
| <td>month</td> | |
| </tr> | |
| </table> | |
| </div> | |
| </div> | |
| <hr/> | |
| </div> | |
| </div> | |
| <hr/> | |
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