How to view the old data in a column if that column is dropped or rename

Question

Using workspace manager I am not able to track the old data of a column which is dropped.
I have tried by using import and export features that Workspace manager have.. But import is not working properly in this case. And savepoint option is work with DML operation not with DDL.So, I want help in this matter
Thanks In Advance

Answer 1

No way even in 10g. You should build another DB and import your exported data.
then you can get data from this new DB.
SQL>create table t5 as select object_id,object_name,created from all_objects where rownum<20;
Table created.
SQL>select  current_scn from v$database;
CURRENT_SCN
7724122625
SQL>desc t5
Name                                      Null?    Type
OBJECT_ID                                          NUMBER
OBJECT_NAME                                        VARCHAR2(30)
CREATED                                            DATE
SQL>alter table t5 rename column OBJECT_ID to oid;
Table altered.
SQL>desc t5
Name                                      Null?    Type
OID                                                NUMBER
OBJECT_NAME                                        VARCHAR2(30)
CREATED                                            DATE
SQL>alter table t5 drop column created;
Table altered.
SQL>desc t5
Name                                      Null?    Type
OID                                                NUMBER
OBJECT_NAME                                        VARCHAR2(30)
SQL>select * from t5 as of scn 7724122625;
select * from t5 as of scn 7724122625
ERROR at line 1:
ORA-01466: unable to read data - table definition has changed