如何在codeigneiter中的select语句中使用between子句 - How to use between clause in select statement in codeigneiter

How to use between clause in select statement in codeigneiter

我试图从数据库中获取数据，方法是从一个表中获取一个数据行，并将这些值用作where条件。然后我尝试将json字符串传递给控制器类。但我够不着。我应该如何编写此代码这是我用来获取数据的代码。

 $query = $this->db->query("SELECT * FROM todaywork WHERE idEmployee = $user ");
        if ($query->num_rows() > 0)
        {
           $row = $query->row(); 
               $from = $row->T_frange;
               $to = $row->T_trange;
               $note = $row->T_note;
        }     
               $this->db->select("cus.idCustomer,cus.C_name,f.F_itemname,ctr.*");
                //$whereCondition = array('cus.idCustomer' => $_POST['custId']);
                $this->db->where('C_trnoofarr BETWEEN {$from} AND {$to}');
                //filter where
                $this->db->from('customer cus');
                $this->db->join('contracts AS ctr', 'cus.idCustomer = ctr.idCustomer', 'INNER');
                $this->db->join('facility AS f','ctr.idContracts = f.idContracts','INNER');
                $query = $this->db->get();
                return $query->result();
    }

在之间使用此选项

$this->db->where('C_trnoofarr >', $from);
$this->db->where('C_trnoofarr <', $to);

替换此，

$this->db->where('C_trnoofarr BETWEEN {$from} AND {$to}');

有了这个，

$this->db->where('C_trnoofarr >', $from);
$this->db->where('C_trnoofarr <', $to);

不过，如果要在WHERE子句中使用raw，还必须添加第三个参数。

$this->db->where('<where clause>', NULL, FALSE);

来自文档：

$this->db->where（）接受可选的第三个参数。如果您将其设置为FALSE，CodeIgniter将不会尝试使用反标记来保护字段或表名。

在你的情况下，也许是这样，

$this->db->where('C_trnoofarr BETWEEN {$from} AND {$to}', NULL, FALSE);

                $this->db->select('*'); 
                $this->db->from('company');
                $this->db->where("grade BETWEEN $first AND $second");
                $this->db->get()->result();