TSQL插入其他行
对于以下问题,识别和插入行的最有效方法是什么 这是我的样本数据TSQL插入其他行,tsql,sql-server-2008-r2,Tsql,Sql Server 2008 R2,对于以下问题,识别和插入行的最有效方法是什么 这是我的样本数据 vId StartDate EndDate Distance ------------------------------------ 256 2015-03-04 2015-03-05 365 271 2015-03-04 2015-03-04 86 315 2015-03-05 2015-03-06 254 256 2015-03-07 2015-03-09 150 458 2015-03-1
vId StartDate EndDate Distance
------------------------------------
256 2015-03-04 2015-03-05 365
271 2015-03-04 2015-03-04 86
315 2015-03-05 2015-03-06 254
256 2015-03-07 2015-03-09 150
458 2015-03-10 2015-03-12 141
458 2015-03-15 2015-03-17 85
315 2015-03-15 2015-03-16 76
我想为每个vId添加额外的行,其中StartDate-EndDate如下所示,所以不只是
315 2015-03-05 2015-03-06 254
256 2015-03-07 2015-03-09 150
我想展示以下几点
315 2015-03-05 2015-03-06 254
315 2015-03-06 2015-03-06 0
256 2015-03-07 2015-03-09 150
256 2015-03-08 2015-03-09 0
256 2015-03-09 2015-03-09 0
提前感谢。只需简单插入:
Insert Into Table(vId, StartDate, EndDate, Distance)
Select vId, DateAdd(dd, 1, StartDate), EndDate, 0
From TableName
Where StartDate <> EndDate
如果只需选择而不插入,则:
Select vId, StartDate, EndDate, Distance
From TableName
Union All
Select vId, DateAdd(dd, 1, StartDate), EndDate, 0
From TableName
Where StartDate <> EndDate
编辑
这假设存在最大100天的差异。如果间隔较长,可以添加更多交叉连接以增加可能的值:
declare @t table(vId int, StartDate date, EndDate date, Distance int)
insert into @t values
(315, '2015-03-05', '2015-03-06', 254),
(256, '2015-03-07', '2015-03-09', 150)
;with cte as(select row_number() over(order by (select 1)) as rn
from (values(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) t1(n)
cross join (values(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) t2(n)
)
select * from @t
union all
select t1.vId, ca.StartDate, t1.EndDate, 0
from @t t1
cross apply(select dateadd(dd, c.rn, StartDate) as StartDate
from cte c
where dateadd(dd, c.rn, t1.StartDate) <= t1.EndDate) as ca
where t1.StartDate <> t1.EndDate
order by vId, StartDate
请参阅fiddle,当开始日期和结束日期之间的差异仅为1天时,它似乎工作正常。我有几行的差异超过一天。如果是问题,我不理解这个问题。我更新了问题以清楚地解释这一点。以下各项的差异为2天256 2015-03-07 2015-03-09 150。所以我需要另外两排。谢谢,这对我很有帮助