Use RAND() in User Defined Function

Question

I am trying to create a user defined function which calls the system RAND() function inside it, when I try to create the function it errors out with the followi

Answer 1

Just pass RAND() value as parameter from outside:

CREATE FUNCTION getNumber(@_id int, @RAND FLOAT)
RETURNS DECIMAL(18,4)
AS
BEGIN
   DECLARE @RtnValue DECIMAL(18,4);

   SELECT TOP 1 @RtnValue = EmployeeID 
   FROM dbo.Employees
   ORDER BY EmployeeID DESC

   SET @RtnValue = @RAND * @RtnValue * (1/100)

   RETURN @RtnValue;
END

And call as getNumber(10, RAND())

No any side effects.