Sql server 比较sql查询中给出错误的两个日期-Codeigniter查询生成器

这是我的密码：

function get_late_jobs($date1, $date2) {
    $this->db->select('Delivery.Packlist, Delivery.Job, Delivery.Promised_Date, Delivery.Shipped_Date, Job.Customer');
    $this->db->join('Job', 'Delivery.Job = Job.Job', 'inner');
    $this->db->where('Delivery.Promised_Date <', 'Delivery.Shipped_Date');
    $this->db->where('Delivery.Job IS NOT NULL', NULL);
    $this->db->where('Delivery.Shipped_Date IS NOT NULL', NULL);
    $this->db->where('Delivery.Shipped_Date >=', $date1);
    $this->db->where('Delivery.Shipped_Date <=', $date2);
    $this->db->order_by('Delivery.Shipped_Date');
    $query = $this->db->get( 'Delivery' );
    return $query->result_array();
}

函数get\u late\u jobs（$date1，$date2）{ $this->db->select（'Delivery.Packlist，Delivery.Job，Delivery.Promised\u Date，Delivery.Shipped\u Date，Job.Customer'）； $this->db->join（'Job'，'Delivery.Job=Job.Job'，'inner'）； $this->db->where（'Delivery.promisted_Date='，$date1）； $this->db->where（'Delivery.Shipped_Date我建议更换

'Delivery.Shipped_Date'

与

---

前者是一个不能转换为日期的字符串常量。

如果我注释掉这行：$this->db->where（'Delivery.Promised\u date），您的列

Promised\u date

似乎没有存储为日期。这有帮助吗？

'Delivery.Shipped_Date'

"Delivery"."Shipped_Date"