SQL 服务器，运行总数，每个月重置并再次求和

Question

我有一个日历 table，其中标有工作日。现在我需要一个名为“current_working_day”的运行总计，它总结了一个月结束前的工作日并再次重新启动。

这是我的查询：

select
WDAYS.Date,
WDAYS.DayName,
WDAYS.WorkingDay,
sum(WDAYS.WorkingDay) OVER(order by (Date), MONTH(Date), YEAR(Date))  as 'current_working_day',
sum(WDAYS.WorkingDay) OVER(PARTITION by YEAR(WDAYS.Date), MONTH(WDAYS.Date) ) total_working_days_per_month
from WDAYS
where YEAR(WDAYS.Date) = 2022

这是我当前的输出

Date	DayName	WorkingDay	current_working_day	total_working_days_per_month
2022-01-27	Thursday	1	19	21
2022-01-28	Friday	1	20	21
2022-01-29	Saturday	0	20	21
2022-01-30	Sunday	0	20	21
2022-01-31	Monday	1	21	21
2022-02-01	Tuesday	1	22	20
2022-02-02	Wednesday	1	23	20
2022-02-03	Thursday	1	24	20

但是“current_workind_day”栏应该是这样的

Date	DayName	WorkingDay	current_working_day	total_working_days_per_month
2022-01-27	Thursday	1	19	21
2022-01-28	Friday	1	20	21
2022-01-29	Saturday	0	20	21
2022-01-30	Sunday	0	20	21
2022-01-31	Monday	1	21	21
2022-02-01	Tuesday	1	1	20
2022-02-02	Wednesday	1	2	20
2022-02-03	Thursday	1	3	20

感谢任何建议。

Answer 1

您可以尝试将 PARTITION by 与 EOMONTH 函数一起使用，这可能会得到相同的结果但性能更好，那么您可能只需要按 Date 排序而不是使用该函数带日期。

select
  WDAYS.Date,
  WDAYS.DayName,
  WDAYS.WorkingDay,
  sum(WDAYS.WorkingDay) OVER(PARTITION by EOMONTH(WDAYS.Date) order by Date)  as 'current_working_day',
  sum(WDAYS.WorkingDay) OVER(PARTITION by EOMONTH(WDAYS.Date) ) total_working_days_per_month
from WDAYS
where YEAR(WDAYS.Date) = 2022

SQL 服务器，运行总数，每个月重置并再次求和

SQL Server, running total, reset for each month and sum again

sql-server

conditional-statements

cumulative-sum

SQL 服务器，运行 总数，每个月重置并再次求和

SQL Server, running total, reset for each month and sum again

sql-server

conditional-statements

cumulative-sum

SQL 服务器，运行总数，每个月重置并再次求和