Aging - Calendar and Business Days Different Records of Data - sql

Question

I am currently using SQL Server 2012 and I have an aging question. I tried to include some sample data below with 4 records.
FileNumber FileType CompletedDate
90440 Internal 8/11/2017
90440 Strategy NULL
90441 Internal 8/10/2017
90441 Strategy NULL
A Strategies' aging is calculated from the Internal FileType's Completed Date all the way up to the Strategy FileType's Completed Date. Every FileNumber can have multiple FileTypes associated with it. If the Strategy's Completed Date is NULL, then it would be from Internal FileType's Completed Date all the way up to today's date or GETDATE().
So I'm trying to show Count of Pending Strategies and their current aging in Business and Calendar Days...so essentially I would want the data to return like this.
File Number FileType AgeBusiness AgeCalendar
90440 Strategy 2 4
90441 Strategy 3 5
Any clue on how I would go about this? Any help is appreciated.

Answer 1

Something like this may work but I'm not 100% sure since it depends on what sort of Filetypes are in the table, whether you are accounting for holidays, what happens when Strategy (or whatever is the latest file type) has a value for completed date.
;WITH Internal AS
(
select FileNumber, FileType,
DATEDIFF(day,CompletedDate,getdate())- (datediff(wk, CompletedDate, getdate()) * 2) -
case when datepart(dw, CompletedDate) = 1 then 1 else 0 end +
case when datepart(dw, getdate()) = 1 then 1 else 0 end as AgeBusiness,
DATEDIFF(day,CompletedDate,getdate()) as AgeCalendar
from #test
where FileType = 'Internal'
)
select t.FileNumber, t.FileType, i.AgeBusiness, i.AgeCalendar
from #test t
inner join Internal i on
(t.FileNumber = i.FileNumber)
where CompletedDate is null
the problem with the above is it wouldn't show a row if Strategy (or whatever is the latest file type) HAS a completed date. Therefore you may want something like
;WITH Internal AS
(
select FileNumber, FileType,
DATEDIFF(day,CompletedDate,getdate())- (datediff(wk, CompletedDate, getdate()) * 2) -
case when datepart(dw, CompletedDate) = 1 then 1 else 0 end +
case when datepart(dw, getdate()) = 1 then 1 else 0 end as AgeBusiness,
DATEDIFF(day,CompletedDate,getdate()) as AgeCalendar
from #test
where FileType = 'Internal'
), Latest AS
(
select FileNumber, FileType, RANK() OVER
(PARTITION BY FileNumber ORDER BY COALESCE(CompletedDate,GETDATE()) DESC) AS rnk
from #test
)
select l.FileNumber, l.FileType, i.AgeBusiness, i.AgeCalendar
from Latest l
inner join Internal i on
(l.FileNumber = i.FileNumber)
where rnk = 1
where it would show the row regardless of if it's null or not, but at the expense of adding a RANK() which is more intensive.

Answer 2

You don't need a CTE but I included it to make it more readable.
WITH DateRanges AS (
SELECT yt.FileNumber
,yt.FileType
,SELECT TOP 1 CompletedDate FROM YourTable WHERE yt.FileNumber = FileNumber AND FileType = 'Internal' AS InternalCompletedDate
,CASE WHEN yt.CompletedDate IS NULL THEN CAST(GETDATE() AS DATE) ELSE yt.CompletedDate END AS StrategyCompletedDate -- I forgot the NULL part too...
FROM YourTable yt
WHERE yt.FileType = 'Strategy'
)
SELECT FileNumber
,FileType
,(DATEDIFF(dd,InternalCompletedDate, StrategyCompletedDate) + 1)
-(DATEDIFF(wk, InternalCompletedDate, StrategyCompletedDate) * 2)
-(CASE WHEN DATENAME(dw, InternalCompletedDate) = 'Sunday' THEN 1 ELSE 0 END)
-(CASE WHEN DATENAME(dw, StrategyCompletedDate) = 'Saturday' THEN 1 ELSE 0 END) AS AgeBusiness
,DATEDIFF(dd, InternalCompletedDate, StrategyCompletedDate) AS AgeCalendar
FROM DateRanges
Edit: Should be good now. I rushed it a bit.