利用NewID()生成随机数

CREATE FUNCTION [dbo].[RandInt](
    @GuidValue as uniqueidentifier
)
RETURNS  int
AS
BEGIN
declare @str as varchar(10)
set @str=left(@GuidValue,8)
declare @i as int
declare @number as int
set @i=0
set @number=0

while(@i<8)
begin
    set @number=@number + (Ascii((substring(@str,@i+1,1)))*Power(10,@i))
    set @i=@i+1
end

return @number

END