使用SQL Server对会计年度进行分组

Question

SQL Server中是否有一种方法可以从具有日期列(1998到2010)的表中显示会计年度(从10月1日开始到9月30日结束).这是我做的:

select 'FY1999' as FY, site, count(*)
from mytable
where mydate >='10/1/1998' 
    and mydate <'10/1/1999'
group by site

---

select 'FY2000' as FY, site, count(*)
from mytable
where mydate >='10/1/1999' 
    and mydate <'10/1/2000'
group by site

---

select 'FY2001' as FY, site, count(*)
from mytable
where mydate >='10/1/2000' 
    and mydate <'10/1/2001'
group by site

---

这个年度超过10年这样做是不是太重复了？

Answer 1

这是一个单独的查询,可以为您提供所需的信息.

SELECT DATEPART(yyyy, DATEADD(mm, 3, mydate)) AS FY, site, COUNT(*) AS row_count
FROM mytable
GROUP BY DATEPART(yyyy, DATEADD(mm, 3, mydate)), site

Answer 2

您甚至可以在SQL Server中创建用户定义的函数,该函数采用日期参数并将会计年度作为int返回:

CREATE FUNCTION GetFiscalYear(@TheDate date)
RETURNS int
AS
BEGIN
    DECLARE @FiscalYear int  

    IF DATEPART(month, @TheDate) < 10
        SELECT @FiscalYear = DATEPART(year, @TheDate)
    ELSE
        SELECT @FiscalYear = DATEPART(year, @TheDate) + 1  

    RETURN @FiscalYear
END

然后你可以使用它,例如:

SELECT Id, ShippingDate, GetFiscalYear(ShippingDate)
FROM SomeTable