致命错误：带有消息'SQLSTATE [42000]的未捕获异常'PDOException'：语法错误或访问冲突：1064使用或在查询中

Question

在我的sql查询中添加循环！=“”时出现错误

    $DuplicateCheck='select * from acpass where acno= :cname and securtyq != 
     "" or loop != ""';

            $RsDuplicate=$connpdo->prepare($DuplicateCheck);
            $RsDuplicate->bindParam(':cname', $cname[$l], PDO::PARAM_STR);



            $RsDuplicate->execute();


        $RowS=$RsDuplicate->rowCount();