如何在Codeigniter中从数据库的一个表中的一列乘以值？

Question

I want to multiply value from table after I selected from database in one column and table using forearch loops

Here is my selection data from database and I don't know to multiply total value in its column

public function total_comp_in(){

        $this->query = $this->db->get_where('prifix',array('status'=>1)); 
        if($this->query->num_rows()>0){ 
             return $this->query->result();
        }
    }

the result I want to total my value as below images.

Answer 1

Loop over the results and multiply it:

if($this->query->num_rows()>0){ 
    $total = 1;
    $result =  $this->query->result();
    foreach($result as $row) {
        $total *= $row->total;
    } 
    return $total;
}

However, that won't make 2*2*2*2*5 equal 48... maybe if there was a 3 instead of that 5...

Answer 2

Try this one , you can get the result directly without looping (numbers should be only positive)

SELECT CAST(EXP(SUM(LOG(total))) AS UNSIGNED) AS result
FROM prifix WHERE status = 1