optimize the stored procedure

CREATE PROCEDURE emp_summary

@.emp_id int ,@.start_date datetime=0,@.end_date datetime=0

AS

SET NOCOUNT ON

IF @.start_date=0 AND @.end_date=0

BEGIN

SET @.end_date=getdate()

SELECT *
FROM emp WHERE emp_id_id=@.emp_id AND a.join_date>@.start_date AND a.joindate<=@.end_date

END

ELSE

SELECT *
FROM emp WHERE emp_id_id=@.emp_id AND a.join_date>@.start_date AND a.joindate<=@.end_date+1
GO

This is the Stored procedure i wrote to get the emp summary with date range and with no date ranges.If i pass start_date and end_Date Sp executes 'else' part if dont pass the parameters it execultes 'IF' part.Can i optimize this SP further?I'd use:CREATE PROCEDURE
@.emp_id INT
, @.start_date DATETIME = NULL
, @.end_date DATETIME = NULL
AS

SELECT *
FROM emp
WHERE emp_id = @.emp_id
AND join_date BETWEEN Coalesce(@.start_date, join_date) AND Coalesce(@.end_date, join_date)

RETURN
GOIf you can't afford the table scan, I'd resort to using dynamic SQL, but I'd try this first.

-PatP