Data type size for the view column

Question

I am creating a view from base table using substr() for some fields. The data type size of the column in the view becomes twice the size of the corresponding column in the base table. Example
SQL> create table temp_sat(name varchar2(20));
Table created.
SQL> create view temp_view as select substr(name,1,10) name from temp_sat;
View created.
SQL> desc temp_view
Name Null? Type
NAME VARCHAR2(40)
Can i specify the size of the column while creating view

Answer 1

satish asnani wrote:
I am creating a view from base table using substr() for some fields. The data type size of the column in the view becomes twice the size of the corresponding column in the base table. Example
SQL> create table temp_sat(name varchar2(20));
Table created.
SQL> create view temp_view as select substr(name,1,10) name from temp_sat;
View created.
SQL> desc temp_view
Name                                      Null?    Type
NAME                                               VARCHAR2(40)Can i specify the size of the column while creating viewHi,
Which platform and Oracel DB version?
I had try to replicate, but I can't:
SQL> create table t_v
  2  (id varchar2(20));
Tabla creada.
SQL> desc t_v
Nombre                                                            ┐Nulo?   Tipo
ID                                                                         VARCHAR2(20)
SQL> r
  1  create view v_t_v
  2  as
  3  select substr(id,1,10) id
  4* from t_v
Vista creada.
SQL> desc v_t_v
Nombre                                                            ┐Nulo?   Tipo
ID                                                                         VARCHAR2(10)John