SQL语句生成指定范围内随机数

create procedure awf_RandDouble 
   @min dec(14,2),
   @max dec(14,2), 
   @result dec(14,2) output
as 
begin
	set @result= cast((rand()*(@max-@min)+@min) as dec(14,2))
    return @result
end
create procedure awf_RandDoubl