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[英]Update 1 row at a time and each row has a different value when using x-editable for the same user
[英]Check and update the row depending on same or different value
如果所有行的值都设置为相同的值,我试图更新状态。
我的查询像这样
$ord = "SELECT * FROM plitems WHERE pur_order_id='".$order_id."'";
$ord1 = mysqli_query($con, $ord);
while($ord2 = mysqli_fetch_array($ord1)) {
if(($ord2['invoice_status']=='Invoiced'))
{
$m5 = mysqli_query($con, "UPDATE pur_orders SET status='Invoiced' WHERE pur_order_id='".$order_id."'");
}
else
{
$m5 = mysqli_query($con, "UPDATE pur_orders SET status='Partial' WHERE pur_order_id='".$order_id."'");
}
但是这里我在plitems
表中有2个订单项,第一个订单项的状态为Invoiced
,第二个订单项的状态为Partial
,但仍将pur_orders
状态设置为Invoiced而不是Partial
使用使用GROUP BY
的查询查找状态相同的订单。
UPDATE pur_orders AS p
CROSS JOIN (
SELECT MAX(invoice_status) AS invoice_status
FROM plitems
WHERE pur_order_id = $order_id
HAVING COUNT(DISTINCT invoice_status) = 1) AS t
SET p.status = t.invoice_status
WHERE p.pur_order_id = $order_id
如果只有一种状态,则子查询将返回具有该状态的一行,然后将其分配给pur_orders.status
。 如果状态不止一个,则子查询将不返回任何行,因此CROSS JOIN
将产生一个空的叉积,并且不会更新任何内容。
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