Question

我有一个恼人的问题，我有一个使用内部联接的查询，如果我说例如SELECT *，查询打印出结果，但是当我开始插入实际的列名时它返回我失败的查询错误，＆＃34; 0结果＆＃34;。

我得到了这个错误

注意：尝试获取非对象的属性。

SELECT COLUMN NAMES

  $ord_dets = "
  SELECT cod.Fname
       , cod.Lname
       , od.City_name
       , od.Product_Name 
    FROM Customer_order_details cod
    JOIN ord_dets od
      ON od.Order_ID = cod.Order_ID
    JOIN Payment p
      ON p.Order_ID = cod.Order_ID
   WHERE cod.Order_Id = '$OrdID';
   ";

$ord_result = $dbc->query($ord_dets);

if ($ord_result->num_rows > 0) {
while ($row_dets = $ord_result->fetch_array()) {
        $Cust_Fname = $row_dets['Fname'];
}

} else {
 echo "0 results";
  }
$dbc->close();

SELECT *

 $ord_dets = "
 SELECT * 
   FROM Customer_order_details cod
   JOIN ord_dets od
     ON od.Order_ID = cod.Order_ID 
   JOIN Payment p
     ON p.Order_ID = cod.Order_ID
  WHERE cod.Order_Id = '$OrdID';
  ";

$ord_result = $dbc->query($ord_dets);

......

我不想选择*，因为我将从4/5表中选择数据。

我尝试了fetch_assoc和fetch_row而不是fetch_array，我收到了相同的错误消息。

有人能指出可能导致此问题的原因吗？

表架构

ord_dets

 CREATE TABLE `ord_dets` (
 `ord_dets_id` bigint(255) NOT NULL AUTO_INCREMENT,
 `Order_ID` bigint(255) NOT NULL,
 `custmer_ip` varchar(100) NOT NULL,
 `Resturant_ID` bigint(255) NOT NULL,
 `Resturant_name` varchar(100) NOT NULL,
 `City_name` varchar(100) NOT NULL,
 `Product_Id` bigint(255) NOT NULL,
 `Product_Name` varchar(100) NOT NULL,
 `Product_Price` decimal(4,2) NOT NULL,
 `Date_Time_Placed` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE   CURRENT_TIMESTAMP,
  PRIMARY KEY (`ord_dets_id`)
  ) ENGINE=InnoDB AUTO_INCREMENT=31 DEFAULT CHARSET=utf8

Customer_order_details

 CREATE TABLE `Customer_order_details` (
  `Order_ID` bigint(255) NOT NULL AUTO_INCREMENT,
  `Customer_ID` bigint(255) DEFAULT NULL,
  `Fname` varchar(100) NOT NULL,
  `Lname` varchar(100) NOT NULL,
  `Cust_Email` varchar(320) NOT NULL,
  `Cust_M_Phone` varchar(12) NOT NULL,
  `Cust_H_Phone` varchar(16) NOT NULL,
  `Door_num` varchar(100) NOT NULL,
  `Line_1` varchar(200) NOT NULL,
  `Line_2` text NOT NULL,
  `City_Name` text NOT NULL,
  `Postcode` varchar(8) NOT NULL,
  `Status` tinyint(4) NOT NULL,
   PRIMARY KEY (`Order_ID`)
   ) ENGINE=InnoDB AUTO_INCREMENT=147 DEFAULT CHARSET=outfit

查询在SELECT *列时有效，但在指定列名时无效

0 个答案: