PHP How can I show total data based on Department - php

Question

I have a code below :
<table>
<th class="th1">OT Date</th>
<td class="td1"><?php echo $date?></td>
<tr>
<th class="th" colspan="7">Department</th>
<tr>
<td class="td1" style="width: 100px;">Accounting</td>
<td class="td1" style="width: 100px;">Admin</td>
<td class="td1" style="width: 100px;">Facility</td>
<td class="td1" style="width: 100px;">IQC</td>
<td class="td1" style="width: 100px;">PC</td>
<td class="td1" style="width: 100px;">Production</td>
<td class="td1" style="width: 100px;">Store</td>
<tr>
<td class="td">20</td>
<td class="td">20</td>
<td class="td">20</td>
<td class="td">20</td>
<td class="td">20</td>
<td class="td">20</td>
<td class="td">20</td>
</table>
I plan to show total data based on Department. So in table example Admin, will automatically total the data.
and this is the php function code :
<?php
include ("config.php");
$dept="Admin";
$pesan = mysql_query("SELECT submission_no FROM t_submissions WHERE dept_name='$dept'");
$j = mysql_num_rows($pesan);
if($j>0)
{
echo $j;
}
else
{
echo "no data";
}?>
How can I set it if dept=Admin, then it will update total data to admin table, if dept=Accounting, it will update it too and so on.

Answer 1

You can use GROUP BY with aggregate functions in your MySQL query to add or otherwise organize the data by department and then display it in your webpage:
SELECT SUM(column_name) FROM t_submissions GROUP BY dept_name;
Obviously you will change the query according to your needs.