如何從 SQL 到 select 上一個日期記錄

Question

我想 select 從 sql 的選定日期開始的上一條記錄。

controller

if ($this->input->post("show"))
{
$date=$this->input->post("date");
$where=array("date <="=>$date);
$result=$this->Common_model->select_previous("pso_meter",$where);
var_dump($result);
}

model

public function select_previous($table,$where)
{
        $this->db->select("*");
        $this->db->limit('1');
        $this->db->order_by('date','DESC');
        $query = $this->db->get_where($table, $where);
        return $query->row();
}

Answer 1

Controller

if ($this->input->post("show"))
{
$date=$this->input->post("date");
$where=array("date <"=>$date);
$result=$this->Common_model->select_previous("pso_meter",$where);
var_dump($result);
}