Need assistance with join statement PHP/PDO

How do I correctly structure this join statement?

$query1 = $conn->query("SELECT * FROM `Outdoor_Invoices` LEFT JOIN `oc_order` USING (order_id) WHERE PONo = 'order_id'");

//LEFT JOIN `oc_url_alias` USING (query) WHERE product_id');

    while ($row1 = $query1->fetch(PDO::FETCH_ASSOC))
	$orderid = $row1['order_id'];
	$InvAmt = $row1['InvAmt'];
	$OrderTotal = $row1['total'];
	$Profit = ($total - $InvAmt);
$conn->query("UPDATE `Outdoor_Invoices` SET OrderTotal = $OrderTotal, Profit = $Profit WHERE PONo = '$orderid'");

Open in new window

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Terry WoodsIT GuruCommented:
Which one?
lawrence_devAuthor Commented:
Thanks Terry!  I tried a little variation and still cannot get it to work.

$query1 = $conn->query("SELECT * FROM `Outdoor_Invoices` LEFT JOIN `oc_order` USING (order_id) WHERE Outdoor_Invoices.PONo = oc_order.'order_id'");
Terry WoodsIT GuruCommented:
I wonder if it's because order_id is in single quotes rather than backticks? You don't need them anyway for the given table and column names.

Try this:
$query1 = $conn->query("
SELECT * FROM Outdoor_Invoices
LEFT JOIN oc_order USING (order_id) 
WHERE Outdoor_Invoices.PONo = oc_order.order_id

Open in new window

PMI ACP® Project Management

Prepare for the PMI Agile Certified Practitioner (PMI-ACP)® exam, which formally recognizes your knowledge of agile principles and your skill with agile techniques.

lawrence_devAuthor Commented:
Terry,  the columns and table names are correct, however, I am getting the following error:

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42S22]: Column not found: 1054 Unknown column 'order_id' in 'from clause'' in OutdoorProfit.php:125 Stack trace: #0 OutdoorProfit.php(125): PDO->query('SELECT * FROM O...') #1 {main} thrown in OutdoorProfit.php on line 125

Column  /   Table

PONo   /  Outdoor_Invoices

order_id  /  oc_order
Terry WoodsIT GuruCommented:
Ok, it's reasonably clear you want to join the two tables using Outdoor_Invoices.PONo = oc_order.order_id

So I think perhaps this is what you want:
$query1 = $conn->query("
SELECT * FROM Outdoor_Invoices
LEFT JOIN oc_order ON oc_order.order_id = Outdoor_Invoices.PONo 

Open in new window

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
lawrence_devAuthor Commented:
Sorry Terry for the delay!!  That worked great!!  THANKS!!!
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.