Question

表user左连接表personal_record然后加入表activity。

user table：id ...

personal_record table：user.id，activity.id，confirm_time ...

activity：id，time，delete_time ...

注意：时间是指花在此活动上的时间，等等。

在user加入personal_record之前，部分persanoal_record行需要过滤为personal_record仅在设置confirm_time时有效。personal_reocrd仅包含activity_id， activity其中包含的活动＆＃39;时间需要加入到一个人花的总和（时间）。

通过更新activity.delete_time列来删除活动。

这是我的代码。

更新（几乎已解决）:( $ data_begin过滤记录范围）

$result = $this->db->select('user.*, ifnull(sum(ac.time), 0) as time')
                   ->from('user')
                   ->join('(select * from personal_record where personal_record.confirm_time is not null) as pr','user.id = pr.person', 'left')
                   ->join('(select * from activity where activity.delete_time is null and activity.create_time >"'.$date_begin.'")as ac','ac.id = pr.activity', 'left')
                   ->group_by('user.id')
                   ->order_by('time', 'desc')
                   ->get()
                   ->result();

Answer 1

$this->db->select('user.*,personal_record.*,ifnull(sum(activity.time), 0) as time');
$this->db->from('user');
$this->db->join('personal_record','personal_record.person = user.id');
$this->db->join('activity','activity.id = personal_record.activity');
$this->db->where('activity.delete_time',null);
$this->db->or_where('personal_record.confirm_time !=', null);
$this->db->order_by('time', 'asc');
$this->db->group_by('user.id');
$data = $this->db->get()->result();
return $data;

codeigniter on和组合

1 个答案: