html tr 태그
<tr> 태그와 내부에 배치된 <td>, <th> 태그들
<table>
    <tr> <!-- td는 tr의 자식으로 마크업해야 합니다! -->
        <td>Data Cell A</td>
        <td>Data Cell B</td>
        <td>Data Cell C</td>
    </tr>
    <tr>
        <td>Data Cell D</td>
        <td>Data Cell E</td>
        <td>Data Cell F</td>
    </tr>
</table>
실제 적용된 모습
td {
    padding: 0.5em 1em;
    border: 1px solid gray;
}
실제 적용된 모습
colspan
colspan
<table>
    <tr>
        <td colspan="2">Data Cell A</td>
        <td>Data Cell B</td>
    </tr>
    <tr>
        <td>Data Cell A-A</td>
        <td>Data Cell B-B</td>
        <td>Data Cell C-C</td>
    </tr>
</table>
td {
    padding: 0.5em 1em;
    border: 1px solid gray;
}
실제 적용된 모습
rowspan
rowspan
<table>
    <tr>
        <td rowspan="2">Data Cell A</td>
        <td>Data Cell B</td>
        <td>Data Cell C</td>
    </tr>
    <tr>
        <td>Data Cell B-B</td>
        <td>Data Cell C-C</td>
    </tr>
</table>
td {
    padding: 0.5em 1em;
    border: 1px solid gray;
}
실제 적용된 모습
<table>
    <tr>
        <th rowspan="2" id="h">Homework</th>
        <th colspan="3" id="e">Exams</th>
        <th colspan="3" id="p">Projects</th>
    </tr>
    <tr>
        <th id="e1" headers="e">1</th>
        <th id="e2" headers="e">2</th>
        <th id="ef" headers="e">Final</th>
        <th id="p1" headers="p">1</th>
        <th id="p2" headers="p">2</th>
        <th id="pf" headers="p">Final</th>
    </tr>
    <tr>
        <td headers="h">15%</td>
        <td headers="e e1">15%</td>
        <td headers="e e2">15%</td>
        <td headers="e ef">20%</td>
        <td headers="p p1">10%</td>
        <td headers="p p2">10%</td>
        <td headers="p pf">15%</td>
    </tr>
</table>
td, th {
    padding: 0.5em 1em;
    border: 1px solid gray;
}
th {
    background-color: #e6e6e6;
}
실제 적용된 모습