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I've been at this question for a bit and I'm currently stuck:

Image Of Question With Example

This is my current attempt:

SQL Code

I only took an image of a small portion of the code since the general idea can be understood within the few case statements. It's turning out to be way too messy and I think theirs an easier way to go about it. An answer isn't necessarily needed but some guidance would help since I'd like to try it out for myself. Thank you!

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1 回答 1

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你还在为这个苦苦挣扎吗？

    Create function fiscalYearSummary (@OrderDate Date, @StartFiscalYearFromGivenMonth int)
    returns nvarchar(20)as

    begin 
        declare @MonthOfYear int
        declare @Quarter int

        set @MonthOfYear = datepart(MONTH, @OrderDate) 
        set @Quarter =  (((((@MonthOfYear  - (@StartFiscalYearFromGivenMonth  )) + 12) % 12) + 1) / 4) + 1

        return  case @Quarter when 1 then 'Quarter I' when 2 then 'Quarter II' when 3 then 'Quarter III' when 4 then 'Quarter IV' else 'Error' end  
    end

这将用于选择

select dbo.fiscalYearSummary('20190101',1) -- January with the first month of the fiscal year January.
select dbo.fiscalYearSummary('20190401',4) -- April with the first month of the fiscal year April.
select dbo.fiscalYearSummary('20191231',1) -- December with the first month of the fiscal year January

我相信它可以做得更好，但这应该让你开始。

I get the Month from the passed in date (1 to 12)
Subtract @StartFiscalYearFromGivenMonth to drag it back by that many months.
Add 12 (a year) to make it positive, mod it with 12 to get it in the range 0 to 11, then add 1 to make that 1 to 12.
I divide the result by 4 to get the quarter - 0 to 3, then add 1 again, into range 1 to 4.
then a simple case returns the quarter.

我希望这有帮助

于 2019-11-03T15:53:50.687 回答