How to alter column size of a view in Oracle

Question

I am trying to alter the column size of a view with the same command that we use for table like :

alter table 
STUDENT
modify (
    ROLL_NO VARCHAR2(80)
);
         


        

Answer 1

Here is the procedure that I followed :

1- First find the base table for that view by running the following query

SELECT * FROM DBA_DEPENDENCIES
WHERE OWNER = ''
AND NAME = ''
AND TYPE = 'VIEW';

2- Above query will you a table where you will find the base table under the column name 'REFERENCED_NAME'.

3- Now Change the column size of that base table.

NOTE: The view can be made up of 1 or more than 1 tables, so you need to change the column size of all those base tables.