Question

不等于条件不能在我的codeigniter的SQL查询中工作。我也试过＆lt;＆gt;但这也没有用，请一些人帮忙解决这个问题。输出显示等于条件

 $result = $this->db->query("select a.user_email  from users as a, result as b where b.exam_id = '".$exam_id."' and a.user_id  != b.user_id  and  a.active =  1 and a.user_role_id != 1 group by a.user_id")
->result();

Answer 1

尝试使用此功能，因为编译器无法清楚地理解查询是否会导致输出错误。

$query="select a.user_email  "
        . "from users as a, result as b "
        . "where b.exam_id = '".$exam_id."'"
        ."a.active =  1 and"
        . "(a.user_id  != b.user_id)  "
        . "and "
        . "(a.user_role_id != 1 group by a.user_id)"

Answer 2

非常感谢你的建议。这是正确的查询

select * from users 
where user_id not in (select user_id from result  where exam_id = '".$exam_id."')  and  active = 1 and user_role_id != 1

在codeigniter中不等于条件不起作用

2 个答案: