我有这个有效的查询:
$q = $this->db->query('SELECT u.name FROM users u
JOIN user_group ug ON u.id = ug.user_id
JOIN groups g ON g.id = ug.group_id WHERE ug.group_id = "4" ');
我想用活动记录替换它。我想出了类似的东西,但显然它不起作用:
$this->db->select('name');
$this->db->from('users');
$this->db->join('user_group', 'user_group.user_id = users.id);
$this->db->join('groups', 'groups.id = user_group.group_id');
$q = $this->db->get();
由于 Leron
答案 0 :(得分:5)
我想你忘了添加where
条款。并且缺少单引号。
$this->db->select('name');
$this->db->from('users');
$this->db->join('user_group', 'user_group.user_id = users.id');
$this->db->join('groups', 'groups.id = user_group.group_id');
$this->db->where('user_group.group_id', 4);
$q = $this->db->get();