New columns and tables

Question

Hello All,
I need to know the new created tables on my database and the added columns:
I used the below query so i can get the NEW created tables
select * from dba_objects d where to_date(d.created,'dd/mm/yyyy') = to_Date(sysdate-1,'dd/mm/yyyy')  and d.object_type = 'TABLE'and owner = 'MyOwner';
Is there any way to know what are the new added columns to a table, in the below i can know the last DDL, but what i need is to know the added colums
select * from dba_objects d where to_date(d.Last_Ddl_Time,'dd/mm/yyyy') = to_Date(sysdate -1 ,'dd/mm/yyyy') and owner = 'MyOwner';
Thanks in Advance.

Answer 1

consider:
SQL> alter system set audit_trail='db_extended' scope=spfile;
System altered.
SQL> startup force
ORACLE instance started.
Total System Global Area  431038464 bytes
Fixed Size                  1375088 bytes
Variable Size             301991056 bytes
Database Buffers          121634816 bytes
Redo Buffers                6037504 bytes
Database mounted.
Database opened.
SQL> audit alter table;
Audit succeeded.
SQL> conn ami/ami
Connected.
SQL> create table a as select * from dual;
Table created.
SQL> alter table a add b date;
Table altered.
SQL> select sql_text  from dba_audit_trail where sql_text is not null;
SQL_TEXT
alter table a add b dateAmiel Davis