<tr><- Main loop whole <tr> based on unique groups count
<td>1</td>
<td><- Check if there are more than one in group and make condition for "DO"/"DO NOT" loopSub_No + Name_1<br><- Nested loop inside <td> based on groups' values count
Sub_No + Name_2<br>
Sub_No + Name_3<br>
Sub_No + Name_7
</td>
<td>Data_1</td>
<td>Group_1</td>
</tr>