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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
如果所有行的值都設置為相同的值,我試圖更新狀態。
我的查詢像這樣
$ord = "SELECT * FROM plitems WHERE pur_order_id='".$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."'");
}
但是這里我在plitems
表中有2個訂單項,第一個訂單項的狀態為Invoiced
,第二個訂單項的狀態為Partial
,但仍將pur_orders
狀態設置為Invoiced而不是Partial
使用使用GROUP BY
的查詢查找狀態相同的訂單。
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
如果只有一種狀態,則子查詢將返回具有該狀態的一行,然后將其分配給pur_orders.status
。 如果狀態不止一個,則子查詢將不返回任何行,因此CROSS JOIN
將產生一個空的叉積,並且不會更新任何內容。
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