sql user

select  GETDATE(),SYSDATETIME()
select  GETDATE(),SYSDATETIME()
select  GETDATE(),SYSDATETIME()
select  GETDATE(),SYSDATETIME()
select  GETDATE(),SYSDATETIME()

if I run by pressing F5
I am getting the same result why it is not changing ?
----------------------- ----------------------
2014-09-23 11:49:09.993 2014-09-23 11:49:09.99
(1 row(s) affected)                       
----------------------- ----------------------
2014-09-23 11:49:09.993 2014-09-23 11:49:09.99
(1 row(s) affected)                       
----------------------- ----------------------
2014-09-23 11:49:09.993 2014-09-23 11:49:09.99
(1 row(s) affected)                       
----------------------- ----------------------
2014-09-23 11:49:09.993 2014-09-23 11:49:09.99
(1 row(s) affected)                       
----------------------- ----------------------
2014-09-23 11:49:09.993 2014-09-23 11:49:09.99
(1 row(s) affected)

thanks Bala