Question

我试图将time_out时间更新为捕获用户time_in的最后一个id，我的以下代码给了我这个错误

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1

这是我的logout.php

session_start();
if(!isset($_SESSION['MEMBER_ID']) || (trim($_SESSION['MEMBER_ID']) == '')) {
        header("location: index.php");
        exit();
}   

date_default_timezone_set('America/New_York');
$dt = date("Y-m-d h:i:s");      
$id = $_SESSION['MEMBER_ID'];
$sql = "UPDATE hours SET time_out = '".$dt."' WHERE member_id IN (SELECT MAX(hours_id) FROM hours WHERE member_id = '".$id."'";
mysql_query($sql) or die(mysql_error());

    //Unset the variables stored in session
    unset($_SESSION['MEMBER_ID']);
    unset($_SESSION['LOGIN_NAME']);
    unset($_SESSION['PASS']);

这是架构

 `hours_id` int(11) NOT NULL AUTO_INCREMENT,
  `member_id` int(11) NOT NULL,
  `member_name` varchar(32) NOT NULL,
  `team` varchar(32) NOT NULL,
  `time_in` datetime NOT NULL,
  `time_out` datetime DEFAULT NULL,
  `dated` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
    unset($_SESSION['TEAM']);

在这个查询中有什么可能是错的。？

Answer 1

是否已关闭查询中的圆括号？

$sql = "UPDATE hours SET time_out = '".$dt."' WHERE member_id IN (SELECT MAX(hours_id) FROM hours WHERE member_id = '".$id."')";

注意：停止使用已弃用的mysql_ *版本。有更好的选择，如mysqli或pdo

修改

使用单一查询，您可以解决此问题

$sql = "UPDATE hours SET time_out = '".$dt."' WHERE member_id IN (SELECT MAX(hours_id) FROM (SELECT MAX(hours_id) FROM hours WHERE member_id = '".$id."') AS t)";

让我知道它是否适合你

Answer 2

在这里，您的解决方案忘了为内部查询完成括号。

$sql = "UPDATE hours SET time_out = '".$dt."' WHERE member_id IN (SELECT MAX(hours_id) FROM hours WHERE member_id = '".$id."')";

尝试上面的代码它会起作用。建议停止使用旧函数开始使用MySQLi。Reference for MySQLi

Answer 3

这应该是你的 sql

$sql="UPDATE hours SET time_out = '".$dt."' WHERE member_id IN (SELECT MAX(hours_id) FROM hours WHERE member_id = '".$id."')";

Answer 4

使用此查询并再试一次，我希望它能够正常运行

＆＃13;

$sql = "UPDATE hours SET time_out = '$dt' WHERE member_id IN (SELECT MAX(hours_id) FROM hours WHERE member_id = '$id'";

＆＃13;

Answer 5

您的代码应该是这样的

session_start();
if(!isset($_SESSION['MEMBER_ID']) || (trim($_SESSION['MEMBER_ID']) == '')) {
        header("location: index.php");
        exit();
}   

date_default_timezone_set('America/New_York');
$dt = date("Y-m-d h:i:s");      
$id = $_SESSION['MEMBER_ID'];
$sql = "UPDATE hours SET time_out = '".$dt."' WHERE member_id IN (SELECT MAX(hours_id) FROM hours WHERE member_id = '".$id."')";
mysql_query($sql) or die(mysql_error());

    //Unset the variables stored in session
    unset($_SESSION['MEMBER_ID']);
    unset($_SESSION['LOGIN_NAME']);
    unset($_SESSION['PASS']);

尝试在小时表中更新time_out时出现语法错误

5 个答案: