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Loop inside a loop


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Afternoon, wondering if anyone can help me solve this.

I need to loop inside a loop and create an output from this below...


$result = $DBO->query("SELECT * FROM `stocks` ORDER BY `id` ASC");
while($line = $DBO->fetch_array($result, MYSQL_ASSOC)) {
$id = $line['id'];

$resulta = $DBO->query("SELECT * FROM `shares` WHERE `userid`='".$User->id."' AND `companyid`='".$id."'");
while($linea = $DBO->fetch_array($resulta, MYSQL_ASSOC)) {	
$fluc = $linea['cost'];



the first part needs to select all the id's from one table

The second part needs to then select a field 'cost' from another table that matches the user id and the stock id (pulled from first table)

if that makes sense.

Anyone care to point me in the right direction please ?


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