BEGIN

IF condition = TRUE THEN
	@2.sql
END IF;

END;
/

BEGIN

IF condition = TRUE THEN
   create_something;         -- it is a stored procedure which
                             -- contains contents of the 2.sql file
END IF;

END;
/

Declare 
Instance varchar2(100);
Begin

Select instance_name into instance from V$instance;

If instance = ‘OBUS’ then
   @2.sql
Else
   @3.sql
End if;
end;
/

Create or replace procedure test
As
Begin
--
--
End;
/

Create or replace procedure test2
As
Begin
--
--
End;
/