Can we update column in view with some operation

Question

can we maipulate column of a view containing any arthimetic operation
if yes, pls explain me some example
asp

Answer 1

SQL> create or replace view emp_view as select e.*, (sal + nvl(comm, 0)) total from scott.emp e ;
View created.
SQL> desc emp_view
Name                                      Null?    Type
EMPNO                                     NOT NULL NUMBER(4)
ENAME                                              VARCHAR2(10)
JOB                                                VARCHAR2(9)
MGR                                                NUMBER(4)
HIREDATE                                           DATE
SAL                                                NUMBER(7,2)
COMM                                               NUMBER(7,2)
DEPTNO                                             NUMBER(2)
TOTAL                                              NUMBER
SQL> update emp_view set hiredate = hiredate + (1/24) ;
14 rows updated.
SQL> update emp_view set total = total * 1.5 ;
update emp_view set total = total * 1.5
ERROR at line 1:
ORA-01733: virtual column not allowed here
SQL>