Question

请帮我解决此错误：

注意：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，以便使用接近＆＃39; c FROM oc_coupon c LEFT JOIN oc_cheaper_order_coupons coc使用（coupon_id）WHER＆＃39;在第1行错误号码：1064 DELETE oc_coupon c FROM oc_coupon c LEFT JOIN oc_cheaper_order_coupons coc using(coupon_id) WHERE coc.order_id = '26' in /home/blablabl/public_html/shop/system/database/mysql.php on line 50

代码是：

class ModelSaleCheaper extends Model {
    public function deleteOrder($order_id) {
        $this->db->query("DELETE " . DB_PREFIX . "coupon c FROM " . DB_PREFIX . "coupon c LEFT JOIN  " . DB_PREFIX . "cheaper_order_coupons coc using(coupon_id) WHERE coc.order_id = '" . (int)$order_id . "'");
        $this->db->query("DELETE " . DB_PREFIX . "coupon_product cp FROM " . DB_PREFIX . "coupon_product cp LEFT JOIN  " . DB_PREFIX . "cheaper_order_coupons coc using(coupon_id) WHERE coc.order_id = '" . (int)$order_id . "'");
        $this->db->query("DELETE FROM " . DB_PREFIX . "cheaper_order_coupons  WHERE order_id = '" . (int)$order_id . "'");
        $this->db->query("DELETE FROM " . DB_PREFIX . "cheaper_order  WHERE order_id = '" . (int)$order_id . "'");

Answer 1

有效查询可能如下所示：

DELETE c -- assuming you only want to DELETE from coupon 
  FROM " . DB_PREFIX . "coupon c 
  JOIN " . DB_PREFIX . "cheaper_order_coupons coc USING(coupon_id) 
 WHERE coc.order_id = $order_id;

另一个例子......

DELETE cp 
  FROM oc_coupon_product cp 
  JOIN oc_cheaper_order_coupons coc USING(coupon_id) 
 WHERE coc.order_id = 26

如何修复SQL语法中的错误

1 个答案: