Sql probleam with view

Question

according to view it does not effect the base table..........
we cant insert data into view ............ but it is going on please make me understand.....

Answer 1

hi
create table m(n number(2))
insert into m values(1);
insert into m values(2);
insert into m values(3);
insert into m values(4);
create or replace view mvtest as select * from m;
Now we can insert into the view it will automatically affect the base table
insert into mvtest values(5);
insert into mvtest values(6);
insert into mvtest values(7);
to restrict insert into base while insert into view
create or replace mvtest1 as select * from m with read only
insert into mvtest1 values(33);
insert into mvtest1 values(33)
ERROR at line 1:
ORA-01733: virtual column not allowed here
finally come to point
simple view can affect the base table
view with read only option can not affect the base table;
thank you