尝试删除帐户时出现sql错误消息

Question

我收到以下错误消息，但我不认为sql语法错误：您的SQL语法中有错误;检查与您的MariaDB服务器版本对应的手册，以便在第1行'* FROM registration WHERE email =''和password ='''附近使用正确的语法

    // if there's no error, continue to delete
    if( !$error ){

    $query = "DELETE * FROM `registration` WHERE email='$email' and password='$pass'";

    $result = mysqli_query($conn, $query) or die(mysqli_error($conn));
    $count = mysqli_affected_rows($result);

    if (mysql_affected_rows() == 1){

    if (isset($_POST['btn-delete'])){      
        header("location:main.php");  
    }  
    }else{

    $fmsg = "";
    }
    }