Question

我有一个像这样的表：orders（id，created_ts，status）我想生成一个MySQL查询，该查询显示created_ts未结订单的数量。 created_ts是MySQL时间戳

样本数据：

id  created_ts status
--- ---------- -------
1   11-1-2017  Open
2   11-1-2017  Open
3   12-1-2017  Open
4   13-1-2017  Open
5   13-1-2017  Closed
6   14-1-2017  Closed

Outpur：

created_ts  count  
--------    ------  
11-1-2017   2  
12-1-2017   3  
13-1-2017   4  
14-1-2017   4

计数是该日期的未结订单数。
计算方法如下。
日期中的订单数=状态为“未清”且该行的created_ts <= created_ts的所有订单。

我不知道如何解决这个问题。谁能帮我。

Answer 1

您可以使用相关查询来获取不同日期的未结订单的运行总数

select t1.created_ts,
  (select count(*)
   from demo 
   where created_ts <=t1.created_ts 
   and status = 'Open') date_wise_sum
from (
  select distinct created_ts
  from demo 
) t1

Demo

Answer 2

似乎您需要累计金额：

SELECT t.created_ts,
         (@running_total := @running_total + count(case when status='Open'then t.id else null end)) AS countval
    FROM TABLE t
    JOIN (SELECT @running_total := 0) r
group by t.created_ts
ORDER BY t.created_ts

Answer 3

如果我理解正确，我们将仅查看打开的记录，而忽略关闭的记录。您希望使用Windows函数获得的运行总计，该功能自MySQL 8起可用：

select created_ts, sum(sum(status = 'Open')) over (order by created_ts) as cnt
from mytable
group by created_ts
order by created_ts;

例如，在早期版本中，您可以将计数与日期相加：

select dates.created_ts, sum(counted.cnt) as total
from
(
  select distinct created_ts 
  from mytable 
) dates
join 
(
  select created_ts, count(*) as cnt
  from mytable
  where status = 'Open'
  group by created_ts
) counted on counted.created_ts <= dates.created_ts
group by dates.created_ts
order by dates.created_ts;

计数超过日期的订单数

3 个答案: