Question

我正在尝试在sql中创建一个函数，但它不起作用，它接受@year int的参数，返回money的数据类型，使用@year返回Ref_table落在@year和begin_year之间的end_year金额。如果没有值，则返回金额 Ref_table end_year的{{1}}最高@year

这是我的代码： -

CREATE FUNCTION fn_year(
    @year int 
)

RETURNS money
as
begin

declare @begin_year int
declare @end_year int
declare @amount money

select  @begin_year = begin_year,
            @end_year = end_year
from DBO.REF_Table
if @year between year(@begin_year) and year(@end_year)
    select @amount = amount
    from dbo.REF_Table
end
else if @amount is null
begin
    select @amount = amount
    from dbo.REF_Table
    where max @end_year
    and @end_year < @year
end
End
GO

Answer 1

试试这个，

select top 1 @amount = amount from myTable
where @year <= end_year
order by end_year desc

SQL函数问题与max和代码

1 个答案: