问题描述
我想做的是扩展RxEndDates，直到处方中不再有重叠.而且新的扩展名也不会重叠.
What I'd like to do is to extend RxEndDates until there is no more overlap in the prescriptions. And new extensions do not overlap either.
上下文:如果Amy每天服用Humera并在其当前处方用完之前得到补充，则将第二个处方的DaySupply添加到第一个处方中.
Context: If Amy takes Humera daily and gets a refill before her current prescription runs out, then add the DaySupply of the 2nd prescription to the first prescription.
sample data:
User Drug RxStartDate DaySupply RxEndDate
Amy Humera 2/12/2017 7 2/18/2017
Amy Humera 2/28/2017 5 3/4/2017 <--Overlap with below
Amy Humera 3/3/2017 5 3/7/2017 <--Overlap with above, need to combine
Amy Humera 3/8/2017 2 3/9/2017
Amy Humera 3/10/2017 7 3/16/2017
Amy Humera 3/17/2017 30 4/15/2017 <--Overlap with all below, combine
Amy Humera 3/22/2017 2 3/23/2017 <--Overlap
Amy Humera 3/24/2017 2 3/25/2017 <--Overlap
Amy Humera 3/31/2017 3 4/2/2017 <--Overlap
Amy Humera 4/7/2017 5 4/11/2017 <--Overlap
Amy Humera 4/13/2017 30 5/12/2017 <--Overlap
所以我们合并之后，我们得到了
So after we combine, we get
User Drug RxStartDate DaySupply RxEndDate
Amy Humera 2/12/2017 7 2/18/2017
Amy Humera 2/28/2017 10 3/9/2017 <-- Combined from above, new overlap
Amy Humera 3/8/2017 2 3/9/2017 <-- Now this overlaps with above
Amy Humera 3/10/2017 7 3/16/2017
Amy Humera 3/17/2017 72 5/27/2017
User Drug RxStartDate DaySupply RxEndDate
Amy Humera 2/12/2017 7 2/18/2017
Amy Humera 2/28/2017 12 3/11/2017 <-- Combined, again, new overlap
Amy Humera 3/10/2017 7 3/16/2017 <-- Now this overlaps with above
Amy Humera 3/17/2017 72 5/27/2017
User Drug RxStartDate DaySupply RxEndDate
Amy Humera 2/12/2017 7 2/18/2017
Amy Humera 2/28/2017 19 3/18/2017 <-- Combined, again, new overlap
Amy Humera 3/17/2017 72 5/27/2017 <-- Now this overlaps with above
User Drug RxStartDate DaySupply RxEndDate
Amy Humera 2/12/2017 7 2/18/2017
Amy Humera 2/28/2017 91 5/29/2017
There is no more overlap…finished!
有没有一种方法可以自动循环执行或执行某些操作?有什么想法吗?
Is there a way to do this automatically in a loop or something...any ideas?
推荐答案
我认为该解决方案只能通过递归来实现，因为应该有一个循环来计算累积的DaySupply，我看不到任何非循环方法都可以做到这一点. -递归查找.您可以使用递归 CTE -根据官方文档，该版本可从SQL Server 2008开始使用.
一个可能的实现(我添加了一些测试数据来挑战它):
I think the solution can only be implemented by recursion, as there should be a loop that calculates the accumulated DaySupply and I see no way of doing that with any non-recursive lookups. You can do this with recursive CTE - and according to the official doc, it is available starting with SQL Server 2008.
A possible implementation (I added some test data to challenge it):
DECLARE @test TABLE (
[User] VARCHAR(100),
Drug VARCHAR(100),
RxStartDate DATE,
DaySupply INT,
RxEndDate DATE
)
INSERT @test
VALUES
('Amy', 'Humera', '2/12/2017', '7', '2/18/2017'),
('Amy', 'Humera', '2/28/2017', '5', '3/4/2017'),
('Amy', 'Humera', '3/3/2017', '5', '3/7/2017'),
('Amy', 'Humera', '3/8/2017', '2', '3/9/2017'),
('Amy', 'Humera', '3/10/2017', '7', '3/16/2017'),
('Amy', 'Humera', '3/17/2017', '30', '4/15/2017'),
('Amy', 'Humera', '3/22/2017', '2', '3/23/2017'),
('Amy', 'Humera', '3/24/2017', '2', '3/25/2017'),
('Amy', 'Humera', '3/31/2017', '3', '4/2/2017'),
('Amy', 'Humera', '4/7/2017', '5', '4/11/2017'),
('Amy', 'Humera', '4/13/2017', '30', '5/12/2017'),
('Amy', 'Other', '3/24/2017', '7', '3/30/2017'),
('Amy', 'Other', '3/31/2017', '3', '4/2/2017'),
('Amy', 'Other', '4/7/2017', '5', '4/11/2017'),
('Amy', 'Other', '4/13/2017', '30', '5/12/2017'),
('Joe', 'Humera', '3/24/2017', '8', '3/31/2017'),
('Joe', 'Humera', '3/31/2017', '3', '4/2/2017'),
('Joe', 'Humera', '4/12/2017', '5', '4/16/2017'),
('Joe', 'Humera', '4/23/2017', '30', '5/22/2017'),
('Joe', 'Other', '3/24/2017', '60', '5/23/2017'),
('Joe', 'Other', '3/31/2017', '3', '4/2/2017'),
('Joe', 'Other', '4/7/2017', '5', '4/11/2017'),
('Joe', 'Other', '4/13/2017', '30', '5/12/2017')
-- You can comment this out, it is just to show progress:
SELECT * FROM @test ORDER BY [User], Drug, RxStartDate
DECLARE @test_2 TABLE (
[User] VARCHAR(100),
Drug VARCHAR(100),
RxStartDate_base DATE,
DaySupplyCumulative INT
)
;WITH CTE_RxEndDateExtended as (
SELECT [User], Drug, RxStartDate, DaySupply, DaySupply as DaySupplyCumulative, RxStartDate as RxStartDate_base, RxStartDate as RxStartDateExtended, dateadd (dd, DaySupply, RxStartDate) as RxEndDateExtended
FROM @test
-- WHERE [User] = 'Amy' and Drug = 'Humera' and RxStartDate = '2/28/2017'
UNION ALL
SELECT t.[User], t.Drug, t.RxStartDate, t.DaySupply, c.DaySupplyCumulative + t.DaySupply as DaySupplyCumulative, c.RxStartDate_base, t.RxStartDate as RxStartDateExtended, dateadd (dd, t.DaySupply, c.RxEndDateExtended) as RxEndDateExtended
FROM CTE_RxEndDateExtended as c INNER JOIN @test as t
on c.[User] = t.[User] and c.Drug = t.Drug
and c.RxEndDateExtended >= t.RxStartDate and c.RxStartDateExtended < t.RxStartDate
)
INSERT @test_2
SELECT [User], Drug, RxStartDate_base, MAX (DaySupplyCumulative) as DaySupplyCumulative -- comment this out and use this for debugging: SELECT *
FROM CTE_RxEndDateExtended
GROUP BY [User], Drug, RxStartDate_base -- comment this out for debugging
OPTION (MAXRECURSION 0) -- comment this out and use this for debugging (to avoid infinite loops): OPTION (MAXRECURSION 1000)
-- You can comment this out, it is just to show progress:
SELECT * FROM @test_2
ORDER BY [User], Drug, RxStartDate_base -- comment this out and use this for debugging: ORDER BY [User], Drug, RxStartDate_base, RxStartDate, DaySupplyCumulative
SELECT base.*, dateadd (dd, base.DaySupplyCumulative - 1, base.RxStartDate_base) as RxEndDateCumulative
FROM @test_2 as base LEFT OUTER JOIN @test_2 as filter
on base.[User] = filter.[User] and base.Drug = filter.Drug
and base.RxStartDate_base > filter.RxStartDate_base
and dateadd (dd, base.DaySupplyCumulative, base.RxStartDate_base) <= dateadd (dd, filter.DaySupplyCumulative, filter.RxStartDate_base)
WHERE filter.[User] IS NULL
ORDER BY [User], Drug, RxStartDate_base
也许您需要通过简化逻辑对其进行优化.但是请注意不要造成无限循环.调试时，请使用OPTION(MAXRECURSION N )和 N 而不是零.
Maybe you need to optimize it by simplifying the logic. But be careful not to make an infinite loop. When debugging use OPTION (MAXRECURSION N) with N other than zero.
PS .:如果我添加"Amy"，"Humera"，"2/15/2017"，"11"，"2/25/2017"，我也批评其他解决方案，那么这也可以. ..我很好奇它是否按预期工作-请进行测试！
PS.: this one works also if I add 'Amy', 'Humera', '2/15/2017', '11', '2/25/2017', with which I was criticizing the other solutions... I am curious if it works as you expect - please test!
这篇关于延长结束日期，然后重复比较的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！