用户定义的功能练习 [英] User defined function exercises

问题描述

我需要创建一个用户定义的函数来查找简单的兴趣(本金金额为否).年份和费率作为参数.
下一个是创建用户定义的函数以查找数字的阶乘.
帮帮我...

I need to create a user defined function to find simple Interest, with Principal amount, no. of years and rate as parameters.
The next one is to create a user defined function to find the factorial of a number.
Help me out...

推荐答案

create FUNCTION dbo.Factorial ( @iNumber bigint )
RETURNS INT
AS
BEGIN
DECLARE @i  bigint

    IF @iNumber <= 1
        SET @i = 1
    ELSE
        SET @i = @iNumber * dbo.Factorial( @iNumber - 1 )
RETURN (@i)
END


declare @int bigint
exec @int= dbo.Factorial 12
select @int

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