Data type could be same base on source table for blank column

Question

We have an employee table as mentioned structure.
EMPNO NUMBER(4),
ENAME VARCHAR2(10),
JOB VARCHAR2(9),
MGR NUMBER(4),
HIREDATE DATE,
SAL NUMBER(7,2),
COMM NUMBER(7,2),
DEPTNO NUMBER(2)
I want to create a view base on the same/exact structure data type-length. So is there any way we can define Data type while creating view.
Actually, I need to create a view base on above structure but only want to get deptno and sum of salary column from emp table and rest of column will remain blank.
Thanks

Answer 1

Something like this???
CREATE OR REPLACE VIEW v_tmp AS
     SELECT NULL empno,
            NULL ename,
            NULL job,
            NULL mgr,
            NULL hiredate,
            sal sal,
            dept_no
       FROM employees
   GROUP BY dept_no;
   Cheers,
Manik.