php - how to pass two fields as query string to destination page in href statement

one text

I have this code in php

while($row = mysqli_fetch_array($result)) {
?>
<tr>
<td><?php echo $row["Sec_No"]; ?></td>
<td><?php echo $row["Sec_Sub"]; ?></td>
<td><?php echo $row["Sec_Lec"]; ?></td>
<td><a href="Theo_Entery_Sheet.php?Sec_No=<?php echo $row["Sec_No"]; ?>"> ??Enter Marks/>a></td> 
</tr>
<?php

I want to pass the field [Sec_Sub] beside the field [Sec_No] that is exist in href statment as query string to another page (Theo_Entery_Sheet.php)

Theo_Entery_Sheet.php i want the part of SQL "WHERE" take two conditions Sec_No AND Sec_Sub that is comming from above page

... ... ...

$sql = "SELECT theo_stu_sections.Sec_No, theo_stu_sections.St_No, students.Name, theo_stu_sections.Mid, 
. "FROM students INNER JOIN theo_stu_sections ON students.St_ID = theo_stu_sections.St_No\n"
. "WHERE Sec_No='".$_GET['Sec_No']."'\n"
. "ORDER BY students.Name;";

thank You

I want the page to receive two parameters from the page which send query string