大火更多然後在一個請求mysql_query查詢

Question

$updateStock = "UPDATE opening SET qtyUsed = 1000 WHERE openingId = 1 ; UPDATE purchase SET qtyUsed = qtyUsed + 25 WHERE purchaseId = 1"; 

$updateAllStock = mysql_query($updateStock); 

這給了錯誤：Data Not InsertedYou have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UPDATE purchase SET qtyUsed = qtyUsed + ' at line 3

Answer 1

的mysql_query只能同時執行一個查詢。你需要執行兩次mysql_query。

而不是mysql擴展使用mysqli。用mysqli你可以執行多個查詢。 http://www.php.net/manual/fr/mysqli.multi-query.php

Answer 2

您可以使用mysqli_query（） 它允許多個語句。小心。

Answer 3

您正在發送兩個查詢，因此您必須查詢數據庫兩次。在mysqli中支持多個查詢，但強烈建議不要使用此功能，因爲您提高了SQL注入攻擊的可能性。

$updateStock = "UPDATE opening SET qtyUsed = 1000 WHERE openingId = 1"; 
$updatePurchase = "UPDATE purchase SET qtyUsed = qtyUsed + 25 WHERE purchaseId = 1"; 

$updateAllStock = mysql_query($updateStock); 
$updateAllPurchase = mysql_query($updatePurchase);