摘要:[SQLServer]簡單的遞迴範例
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
create function dbo.udf_calfactorial
(@n int = 1)
returns decimal(38,0)
with returns null on null input
as
begin
return (case when @n <= 0 then null
when @n > 1 then
cast(@n as float) * dbo.udf_calfactorial(@n-1)
when @n = 1 then 1 end );
end;
select dbo.udf_calfactorial(3)簡單的遞迴例子，參考Pro T-SQL 2012電子書
