Question

如何根据输入的ID将行更新为输入？例如。 20,23,24更新＆＃39;价格＆＃39; 我的代码：

$result = mysqli_query($con,"UPDATE product SET price=price+(".$reduction."/1.23) WHERE id='".$id."'");

HTML

<form method="post">
<input name="reduction" type="text" >
<input name="id" type="text" value="id" > <input name="submit" value="ID"   type="submit">
</form>

Answer 1

您可以使用＆＃34; IN＆＃34;像这样的功能

$result = mysqli_query($con,"UPDATE product SET price=price+(".$reduction."/1.23) WHERE id in('".$id."')");

Answer 2

您需要格式化查询，如下所示： -

<form method="post">
<input name="reduction" type="text" >
<input name="id" type="text" value="id" > <input name="submit" value="ID"   type="submit">
</form>
<?php 
if(isset($_POST) && !empty($_POST)){
    $id= $_POST['id'];
    $result = mysqli_query($conn,"UPDATE product SET price=price+(".$reduction."/1.23) WHERE id IN ('".$id."')"); // instead of = you have to use `IN`
}

SQL根据ID更新多行

2 个答案: