Question

我是codeigniter的新手，我想请一些帮助。如何将此mysql查询转换为codeigniter活动记录。这是我的查询

 SELECT p.*, s.product_id,sum(s.quantity) as st,  sumq,
sum(s.quantity) - sumq as a, concat (prod_desc,' ',brand_name) as names
from stocks s join ( select product_id, sum(quantity) sumq 
from order_details group by product_id) o on s.product_id = o.product_id join (select * from products) p on p.prod_id = s.product_id 

join (select * from brand) b on b.brand_id = p.brand_id

  group by product_id having a >= 1

Answer 1

        $this->db->select('product_id, sum(quantity) sumq')
            ->from('order_details')
            ->group_by('product_id');
        $query_2 = $this->db->get_compiled_select();
        $this->db->from('products');
        $query_3 = $this->db->get_compiled_select();
        $this->db->from('brand');
        $query_4 = $this->db->get_compiled_select();

        $final_query = "SELECT p.*, s.product_id,sum(s.quantity) as st,  sumq,
sum(s.quantity) - sumq as a, concat (prod_desc,' ',brand_name) as names from stock s JOIN ($query_2) o on s.product_id = o.product_id JOIN ($query_3)p on p.prod_id = s.product_id JOIN ($query_4)b on b.brand_id = p.brand_id
GROUP BY product_id having a >= ?";
        $a = 1;
        $this->db->query($final_query,array($a));
        echo $this->db->last_query();

Codeigniter无法在其活动记录中使用子查询，因此我使用$this->db->get_compiled_select();生成来自活动记录的已编译select语句，然后在$final_query中编写新查询并使用预准备语句运行它。 Does codeigniter $this->db->query() or $this->db->escape() prevent SQL Injection?

Answer 2

我得到了答案。我只是在join中输入select语句。

$this->db->select("p.*,c.category_name,s.size,b.brand_name,sum(t.quantity) as total_q,sumq,sum(t.quantity)-sumq as aq, CONCAT(b.brand_name,' ',p.prod_desc,' ',s.size) AS name", FALSE)

                ->from('stocks t');

                  $this->db->join('products p','p.prod_id = t.product_id','full')
                        ->join('category c','p.category_id = c.category_id','full');
                   $this->db->join('sizes s','p.size_id = s.size_id','full');
                    $this->db->join('brand b','p.brand_id = b.brand_id','full');
                    $this->db->join('(select product_id, sum(order_quantity) sumq from order_details group by product_id) as o','t.product_id = o.product_id','full');
                     $this->db->group_by('prod_id')

                             ->order_by('name');

                $result=$this->db->get();

         if($result->num_rows()>0){
            foreach ($result->result() as $data) {
                $hasil[] = $data;
            }
            return $hasil;
             }

将mysql查询转换为codeigniter活动记录

2 个答案: