此查询有效吗？ 我想更新一个表，将两个不同的表连接起来，并以两种不同的形式显示数据

Question

So, what I'm trying to do is: I've got pageA.php to get the user's name, surname and question saved to the DB (With forms and Jquery). I'm displaying those questions in another table (Used by the "Technical Team" to answer those questions. I want to as soon as I answer, not to show the question in the technical team page anymore, and to display the answer in pageA.php. I've tried several things but nothing quite right yet.

Here's the sql query that I'm not too sure about:

    $Ssql = "UPDATE questions SET Qstatus=1 
    WHERE answers.customerName=users.name 
    FROM users, answers 
    INNER JOIN users 
    ON answers.userID=users.userID;";

What I'm trying to do is, change the Qstatus to 1 when the question is answered. 0 = Not answered, 1 = Answered. First Page to ask for details.

Here's the code I'm using ATM to insert the data to the DB and to update if the question was answered.

        if ($_POST) 
{
    $staffName = test_input($_POST['staffName']);  
    $customerName = test_input($_POST['customerName']);
    $answer = test_input($_POST['answer']);

    try 
    {
        $host = '127.0.0.1';
        $dbname = 'webapp';
        $user = 'root';
        $pass = '';
        $DBH = new PDO("mysql:host=$host;dbname=$dbname", $user, $pass);
    } 

    catch (PDOException $e) 
    {
        echo "An error occurred saving your details. Please, try again!";
    }

    $sql = "INSERT INTO `answers` (`staffName`, `customerName`, `answer`) VALUES (?,?,?);";
    $sth = $DBH->prepare($sql);

    $sth->bindParam(1, $staffName, PDO::PARAM_INT);
    $sth->bindParam(2, $customerName, PDO::PARAM_INT);
    $sth->bindParam(3, $answer, PDO::PARAM_INT);

    $sth->execute();

    $Ssql = "UPDATE questions SET Qstatus=1 WHERE answers.customerName=users.name FROM users, answers INNER JOIN users ON answers.userID=users.userID;";
    $Ssth = $DBH->prepare($Ssql);
    $Ssth->execute();
}

What I'm struggling with is how to change the Qstatus to 1, when the question was answered, and how to trigger to show a table in pageA.php with all answers when there's answers available. Hope it's understandable and all help possible is greatly appreciated! THANK YOU!!

Answer 1

In your query have some issue so i modified.

 $Ssql = "UPDATE questions,users,answers          
         SET Qstatus=1 
         WHERE answers.customerName=users.name   
         AND answers.userID=users.userID;";

Here may be add one conditon also. which is maintain question's anwser one-to-many relation. I dont know your datastructure of table so i cant add it here