如何获取重复 usid 的特定日期范围的最新数据

Posted 2023-02-24

【中文标题】如何获取重复 usid 的特定日期范围的最新数据

【英文标题】：how to get latest data for a particular date range for duplicate usrid

【发布时间】：2020-01-12 20:56:33

【问题描述】：

我有 2 张桌子。一个是用户详细信息，另一个是付款表。我只想在一个月内获得该用户的最新数据。

$sql="SELECT a.usr_id, a.fname, a.lname, c.user_id, c.payment_dt 
       FROM user_details a 
       INNER JOIN payment c 
               ON a.usr_id = c.user_id 
       INNER JOIN (SELECT user_id, 
                          Max(payment_dt) maxDate 
                   FROM   payment 
                   GROUP  BY user_id) b 
               ON c.user_id = b.user_id 
                  AND c.payment_dt = b.maxdate 
WHERE  c.payment_dt BETWEEN '$start_dt' AND '$end_dt' ";
    $ex = $this->db->query($sql);
    $data['info']  = $ex->result();

【问题讨论】：

您遇到了什么问题？

您需要多个付款结果吗？

否。我只需要该用户的最新付款日期行。只有一行。 @Gulshan

我没有得到正确的结果..意味着重复的用户 ID 我没有得到单行。@PathikVejani

试试group_byuser_id

【参考方案1】：

如果您有多个用户 ID，您的查询将产生多行。我认为您正在尝试在给定的用户 ID 上获得结果？添加这可能会有所帮助and a.user_id = '$userID'

$sql="SELECT a.usr_id, a.fname, a.lname, c.user_id, c.payment_dt 
       FROM user_details a 
       INNER JOIN payment c 
               ON a.usr_id = c.user_id 
       INNER JOIN (SELECT user_id, 
                          Max(payment_dt) maxDate 
                   FROM   payment 
                   GROUP  BY user_id) b 
               ON c.user_id = b.user_id 
                  AND c.payment_dt = b.maxdate 
WHERE  c.payment_dt BETWEEN '$start_dt' AND '$end_dt' and a.user_id = '$userID' ";
    $ex = $this->db->query($sql);
    $data['info']  = $ex->result();

【参考方案2】：

更新您的查询：

$start_dt = '2019-04-01';
$end_dt = '2019-04-06';

$sql="SELECT a.usr_id, a.fname, a.lname, c.user_id, c.payment_dt 
       FROM user_details a 
       LEFT JOIN payment c 
               ON a.usr_id = c.user_id 
       LEFT JOIN (SELECT user_id, 
                          Max(payment_dt) maxDate 
                   FROM   payment 
                   GROUP  BY user_id) b 
               ON c.user_id = b.user_id 
                  AND c.payment_dt = b.maxdate 
WHERE  date(c.payment_dt) BETWEEN '$start_dt' AND '$end_dt' GROUP_BY a.usr_id " ;

希望这能解决您的问题

【讨论】：

对不起。当支付表中有重复用户时，它不返回任何数据。@Gulshan

用LEFT替换INNER

现在工作正常后被左连接替换。谢谢@Gulshan

@SwetalinaRay :)

【参考方案3】：

试试这个

$sql="SELECT a.usr_id, a.fname, a.lname, c.user_id, max(c.payment_dt) as payment_dt
FROM user_details a 
INNER JOIN payment c ON a.usr_id = c.user_id 
WHERE  c.payment_dt BETWEEN '$start_dt' AND '$end_dt' group by c.user_id";
$ex = $this->db->query($sql);
$data['info']  = $ex->result();