Question

我一直在使用以下

from . import RecurrenceRelationParser
ImportError: cannot import name 'RecurrenceRelationParser'

计算在DATEDIFF(dd,OrderReceivedDate, DeliveryDate) DaysToDelivery和OrderReceivedDate之间花费的天数

我希望计算每个部门的第90个百分位数。

我有以下

DeliveryDate

我无法使它正常工作

当尝试使用PERCENTILE_DISC(0.9) WITHIN GROUP (ORDER BY DATEDIFF(dd,OrderReceivedDate, DeliveryDate)) OVER (PARTITION BY Department) as 90thpercentile时不允许日期区分吗？还是必须使用存储的图形？

我一直收到错误-OrderReceivedDate或DeliveryDate不在聚合或group by子句中

请帮助

Answer 1

datediff支持PERCENTILE_DISC，我已经在2016 sql server中测试了您的查询，效果很好

 SELECT PERCENTILE_DISC(0.9) 
       WITHIN GROUP (ORDER BY DATEDIFF(dd,OrderReceivedDate, DeliveryDate))
                            OVER (PARTITION BY Department) as "90thpercentile"
from t

我认为列别名中存在问题，请使用双引号或[]作为数字以列名开头

Answer 2

示例代码..您期望的结果集是什么？

--drop table #Temp_Orders
create table #Temp_Orders

(
OrderNo int null
,Department varchar(30) null
,OrderReceivedDate date null
,DeliveryDate date null
)

insert into #Temp_Orders values
(1,'Acc','12-1-2018','12-2-2018')
,(1,'Acc','12-5-2018','12-8-2018')
,(1,'Warehouse','12-1-2018','12-12-2018')
,(1,'Warehouse','12-10-2018','12-12-2018')
,(1,'Acc','11-1-2018','11-29-2018')
,(1,'Acc','10-1-2018','10-9-2018')


select *
,PERCENTILE_DISC(0.9) WITHIN GROUP (ORDER BY DATEDIFF(dd,OrderReceivedDate, DeliveryDate))
OVER (PARTITION BY Department) as [90thpercentile]
from #Temp_Orders

使用日期差异的第90个百分点

2 个答案: