Sql - 如何更新所有行的列？

Question

$sql = "UPDATE debtorsmaster SET  name='" . $_POST['CustName'] . "',
address1='" . $_POST['Address1'] . "',
address2='" . $_POST['Address2'] . "',
address3='" . $_POST['Address3'] . "',

如何更改此更新以更新所有行

Answer 1

因为您没有添加WHERE语句，所有行都将被更新。如上面的注释中所述，您有一个尾随，这会导致查询无效。

此外，它还建议使用预准备语句来阻止SQL注入。

$statement = $db->prepare("UPDATE `debtorsmaster` SET `name`=?, `address1`=?, `address2`=?, `address3`=?");
$statement->bind_param("ssss", $customerName, $address1, $address2, $address3);

$customerName = $_POST['CustName'];
$address1 = $_POST['Address1'];
$address2 = $_POST['Address2'];
$address3 = $_POST['Address3'];

$statement->execute();

编辑：以上示例基于mysqli。