A WHEN function?

Hey,
I’m new to php and having a little trouble making a bit of code work.
What i’m trying to do it show results from various mySQL table. However i only want it to get data from a certain table depending on what is in a cell.

What i have so far doesn’t not work but will post anyway encase it helps you to understand what im trying to do.
I know why this isnt working its just i dont know how to to it. The problem here is that i want it to check each row. The mySQL query works and gives me everything i want when run in php myadmin but when trying to show on php it doesnt work.


$result = mysql_query(
"SELECT *
FROM `activity` 
ORDER BY activity.activityID DESC"
);


if (!$result) {
    die("Query to show fields from table failed");
}

$fields_num = mysql_num_fields($result);

?>
<table class='rcolumn' width='703px' border='1' cellpadding='0' cellspacing='0'>
<?
while($rows=mysql_fetch_array($result)){

if ($rows['description'] == 'Client Added')
	{
		$find = mysql_query(
		"SELECT * 
		FROM  `activity` 
		LEFT JOIN  `clientdetails` ON activity.clientdetails_ClientID = clientdetails.clientID
		WHERE description =  'Client Added'
		ORDER BY activity.activityID DESC ");
		
		
		$urlend = $rows['clientdetails_ClientID'];
		$url = 'clientdetails.php?client='.$urlend;
		
	}
	elseif ($rows['description'] == 'New Enquiry')
	{
		$find = mysql_query(
		"SELECT *
		FROM `activity`
		LEFT JOIN `clientdetails` ON activity.clientdetails_ClientID = clientdetails.clientID
		LEFT JOIN `enquiry` ON activity.enquiry_enquiryID = enquiry.enquiryID
		WHERE description =  'Client Added'
		ORDER BY activity.activityID DESC");
		
		$urlend = $rows['enquiry_enquiryID'];
		$url = 'enquirydetails.php?enquiry='.$urlend;
	}
	elseif ($rows['description'] == 'New Quote')
	{
		$find = mysql_query(
		"SELECT *
		FROM `activity`
		LEFT JOIN `clientdetails ON activity.clientdetails_ClientID = clientdetails.clientID
		LEFT JOIN `quotesummery` ON clientdetails.clientID = quotesummery.ClientDetails_ClientID
		WHERE activity.enquiry_enquiryID = enquiry.enquiryID
		ORDER BY activity.activityID DESC");
		

	}
	else
	{
	}




// sending query


?>


<?
// printing table

?>	

	<tr class="row" onclick="DoNav('<? echo $url;?>');">
	<td width="100px"><? echo $rows['QuoteID']; echo $rows['Initial']; echo $rows['StaffInitial'] ?></td>
	<td width="150px"><? echo $rows['description']; 
	 ?></td>
	<td width="150px"><? echo $rows['FirstName']?>   <? echo $rows['LastName']; ?></td>
	<td width="150px"><? echo $rows['Car']; ?></td>
	<td width="100px"><? echo $rows['Country']; ?></td>
	</tr>


<? 
}
mysql_free_result($result);
?>
</table>

What is the output? What are you seeing the browser? Could you post that too?