支持标前缀

1）查询不等于且有等于

$this->db->get_where('host',array('host'=>'ddd','id !='=>0))->row();

2）2表相交

        return $this->db
            ->select('f.*,count(s.id) as subtotal')
            ->from('category as f')->join('category s', 'f.id=s.upid', 'left')
            ->where('f.upid', $upid)
            ->group_by('f.id')
            ->order_by('f.sort', 'asc')
            ->get()->result();

3）多个order_by 排序

        return $this->db->select('*')
            ->from('v_category')
            ->where('upid',$upid)
            ->order_by('sort','asc')
            ->order_by('id','desc')
            ->get()->result();

        return $this->db->get_where('category', array('id' => $id))->row();

5）多条记录

       return $this->db->get_where('v_category', array('upid' => $upid))->result();

6）统计个数

       $this->db->where('host',$host)->where('id !=',$id)->from('host')->count_all_results();

更多稍后补充，转载请注明来自 default7#zbphp.com，欢迎交流。