合并前
<table>
<thead>
<tr>
<th>房屋编号<th>
<th>房屋名称<th>
<th>房屋状态<th>
<th>设备名称<th>
<th>设备状态<th>
</tr>
</thead>
<tbody>
<tr>
<td>001</td>
<td>A</td>
<td>正常</td>
<td>电视</td>
<td>正常</td>
</tr>
<tr>
<td>001</td>
<td>A</td>
<td>正常</td>
<td>冰箱</td>
<td>正常</td>
</tr>
<tr>
<td>001</td>
<td>A</td>
<td>正常</td>
<td>空调</td>
<td>正常</td>
</tr>
<tr>
<td>002</td>
<td>B</td>
<td>正常</td>
<td>电视</td>
<td>正常</td>
</tr>
<tr>
<td>002</td>
<td>B</td>
<td>正常</td>
<td>电视</td>
<td>冰箱</td>
</tr>
</tbody>
</table>
想要得到合并后的样子
<table>
<thead>
<tr>
<th>房屋编号<th>
<th>房屋名称<th>
<th>房屋状态<th>
<th>设备名称<th>
<th>设备状态<th>
</tr>
</thead>
<tbody>
<tr>
<td rowspan="3">001</td>
<td rowspan="3">A</td>
<td rowspan="3">正常</td>
<td>电视</td>
<td>正常</td>
</tr>
<tr>
<td>冰箱</td>
<td>正常</td>
</tr>
<tr>
<td>空调</td>
<td>正常</td>
</tr>
<tr>
<td rowspan="2">002</td>
<td rowspan="2">B</td>
<td rowspan="2">正常</td>
<td>电视</td>
<td>正常</td>
</tr>
<tr>
<td>电视</td>
<td>冰箱</td>
</tr>
</tbody>
</table>