History of Table Alterations

Hi ,
How can I find the table alteration made in the database tables?
Is there is any system defined tables are there to store these history informations?
Thanks
Jobin .SP

In what version?
Obviously it can be found in the redo logs using DBMS_LOGMNR. It can also be found in 11gR1 if you implement FLASHBACK ARCHIVE.
But generically speaking the answer is no ... this information is not tracked in some data dictionary table.
If you want to wrap your own auditing you can use DDL EVENT TRIGGERS
http://www.psoug.org/reference/ddl_trigger.html

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Please Mark This As Helpful if it helps to solve your issue
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My MSDN Page
My Personal Blog
My Facebook Page
I don't follow you? Anyway, Olaf Helper's answer was the solution.
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user10390682 wrote:
I tried this, but didn't workSince you are specifying default values, it should work (regardless if table DWSODS01.DWT00301_ORD_DTL_OMS is empty or not):
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2 /
COUNT(*)
        14
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3 COMB_ORD_NO NUMBER(12,0)
4 default 0 not null);
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SQL> desc emp1
Name                                      Null?    Type
EMPNO                                              NUMBER(4)
ENAME                                              VARCHAR2(10)
JOB                                                VARCHAR2(9)
MGR                                                NUMBER(4)
HIREDATE                                           DATE
SAL                                                NUMBER(7,2)
COMM                                               NUMBER(7,2)
DEPTNO                                             NUMBER(2)
COMB_ORD_FLG                              NOT NULL NUMBER(5)
COMB_ORD_NO                               NOT NULL NUMBER(12)
SQL> What error are you getting?
SY.

Alter table tablename drop column col

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Hello Gasparotto
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SYS@db102 SQL> grant create session, create table to test01;
Grant succeeded.
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Hi Team,
We have in one of our upcoming release two columns being added to a table that has over 20 million records and 14 indexes.
We needed to add two columns to the table both not null (bit). Because it was taking a while to add the columns, we thought that putting these two alter statements in one batch would speed up the operation significantly but to my surprise it did not.
Conclusion from my test: individual alter statements or batch alter statements take the same time
Here are me test and results - table Order1 and Order2 are exactly the same structure and data.
Test case 1:
===================
ALTER TABLE Order1
ADD OR_N BIT DEFAULT 0 NOT NULL
go
ALTER TABLE AccountTradeConfirmation_Alter1
ADD OR_S BIT DEFAULT 0 NOT NULL
Go
Elapsed Time: 2 hrs
             Mar 18 2015 5:56PM
(1 row affected)
Non-clustered index (index id = 3) is being rebuilt.
Non-clustered index (index id = 4) is being rebuilt.
Non-clustered index (index id = 5) is being rebuilt.
Non-clustered index (index id = 6) is being rebuilt.
Non-clustered index (index id = 7) is being rebuilt.
Non-clustered index (index id = 8) is being rebuilt.
Non-clustered index (index id = 9) is being rebuilt.
Non-clustered index (index id = 10) is being rebuilt.
Non-clustered index (index id = 11) is being rebuilt.
Non-clustered index (index id = 12) is being rebuilt.
Non-clustered index (index id = 13) is being rebuilt.
Non-clustered index (index id = 14) is being rebuilt.
(21777920 rows affected)
Non-clustered index (index id = 3) is being rebuilt.
Non-clustered index (index id = 4) is being rebuilt.
Non-clustered index (index id = 5) is being rebuilt.
Non-clustered index (index id = 6) is being rebuilt.
Non-clustered index (index id = 7) is being rebuilt.
Non-clustered index (index id = 8) is being rebuilt.
Non-clustered index (index id = 9) is being rebuilt.
Non-clustered index (index id = 10) is being rebuilt.
Non-clustered index (index id = 11) is being rebuilt.
Non-clustered index (index id = 12) is being rebuilt.
Non-clustered index (index id = 13) is being rebuilt.
Non-clustered index (index id = 14) is being rebuilt.
(21777920 rows affected)
             Mar 18 2015 7:52PM
Test case 2:
===================
ALTER TABLE Order2
ADD OR_N BIT DEFAULT 0 NOT NULL, OR_S BIT DEFAULT 0 NOT NULL
go
2 hrs elapsed time
             Mar 20 2015 11:10AM
(1 row affected)
Non-clustered index (index id = 3) is being rebuilt.
Non-clustered index (index id = 4) is being rebuilt.
Non-clustered index (index id = 5) is being rebuilt.
Non-clustered index (index id = 6) is being rebuilt.
Non-clustered index (index id = 7) is being rebuilt.
Non-clustered index (index id = 8) is being rebuilt.
Non-clustered index (index id = 9) is being rebuilt.
Non-clustered index (index id = 10) is being rebuilt.
Non-clustered index (index id = 11) is being rebuilt.
Non-clustered index (index id = 12) is being rebuilt.
Non-clustered index (index id = 13) is being rebuilt.
Non-clustered index (index id = 14) is being rebuilt.
(21777920 rows affected)
             Mar 20 2015 1:12PM

Hi Kiran,
I have read your response a few times and I was not able to understand your angle. I assume based on the results of my test that Sybase does the following in processing the alter statements
ALTER TABLE Order2
ADD OR_N BIT DEFAULT 0 NOT NULL, OR_S BIT DEFAULT 0 NOT NULL
go
process alter ADD OR_N BIT
-- > make copy of table
---> alter original table
--> put data back in
process alterOR_S BIT
-- > make copy of table
---> alter original table
--> put data back in
rebuild index
my expectation was that it would make a copy of the table only once and process the two alter statements. Also when doing the alter separately (test1) it rebuilt the index twice, however using the batch the index was rebuilt once (at least only one message displayed).
Regards.

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Hi,
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I need to add the foreign key without deleting the data in the EMP table.
Please advice.
Regards,
Vinesh

Hi,
I need to add the foreign key without deleting the data in the EMP table.Foreign key constraint can have only those values which are present in the primary key of the parent table or null.
When your tables are populated with values and then you are adding the constraint then,
the parent table data is only present in child table or null values.
Example
SQL> create table emp_bkp as select * from emp;
Table created.
SQL> create table dept_bkp as select * from dept;
Table created.
SQL> alter table dept_bkp
2 add constraint pk_deptno primary key(deptno);
Table altered.
SQL> select distinct deptno from emp_bkp;
    DEPTNO
        30
        20
        40
        10
SQL> select deptno from dept_bkp;
    DEPTNO
        10
        20
        30
        40
        55
SQL> alter table emp_bkp
2   add constraint fk_deptno_bkp foreign key(deptno)
3    references dept_bkp(deptno);
Table altered.
SQL> alter table emp_bkp
2 drop constraint fk_deptno_bkp;
Table altered.
SQL> insert into emp_bkp(empno,ename,deptno) values(142,'Fenny',90);
1 row created.
SQL> alter table emp_bkp
2 add constraint fk_deptno_bkp foreign key(deptno)
3   references dept_bkp(deptno);
add constraint fk_deptno_bkp foreign key(deptno)
ERROR at line 2:
ORA-02298: cannot validate (SCOTT.FK_DEPTNO_BKP) - parent keys not found
SQL> update emp_bkp
2 set deptno=null
3 where empno=142;
1 row updated.
SQL> alter table emp_bkp
2 add constraint fk_deptno_bkp foreign key(deptno)
3   references dept_bkp(deptno);
Table altered.
SQL> insert into dept_bkp (deptno,dname)values(90,'IT');
1 row created.
SQL> update emp_bkp
2 set deptno=90
3 where empno=142;
1 row updated.Twinkle

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I have a column is a table defined as a VARCHAR2(4000)
I try to alter the table
alter table sybaapc
MODIFY SYBAAPC_EXTRACURRICULAR VARCHAR2(5000)but it give me this error
ORA-00910: specified length too long for its datatype
I want the users to be able to enter more information on that column.
It seems that 4000 is the max we are in Oracle 10g
can I changed to CLOB or nclob, we already have data in that table?
What are the implications of changing it to clob or nclob,

Thats becuase the maximum character length for a table column is 4000.
Alternatively you can:
SQL> create table test_1 (col1 VARCHAR2(4000))
2 /
Table created.
SQL> insert into test_1 values(RPAD('*',4000,'*'));
1 row created.
SQL> commit;
Commit complete.
SQL> alter table test_1 modify (col1 clob);
alter table test_1 modify (col1 clob)
ERROR at line 1:
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Table altered.
SQL> update test_1 set col2 = col1;
1 row updated.
SQL> commit;
Commit complete.
SQL> alter table test_1 drop column col1;
Table altered.
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Table altered.
SQL> desc test_1
Name Null? Type
COL1 CLOB
SQL>
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COL1
SQL> Edited by: AP on Aug 24, 2010 7:41 AM

Replicating DDL, but only for ALTER TABLE/CREATE TABLE

We're looking to use Streams to replicate our database, for Warehouse use. We're not looking to use any ETL, but rather copy the table structures & data over identically as they appear in the source database. We'll add indexes in a custom step. Otherwise, though, we don't need TRIGGERs, PROCs, VIEWs etc.
Is this possible in Streams? Probably asking if it's possible is the wrong question ... Is this something that is normally done, or does it bring with it a significant amount of complexity, plus some extra things to note (like, "..don't forget TRUNCATE also...")
Thanks,
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Sorry to bump this one ...
So, if our intent is to copy over all tables in a specified list of shemas, in their current form, and then we wanted to capture:
INSERTs
UPDATEs
DELETEs
TRUNCATE TABLE
ALTER TABLE (but excluding anything related to CONSTRAINTS)
(... I'm thinking that's all we'd need to keep a copy of the main db in the warehouse, without a DBA having to "retouch" the warehouse to keep it in sync ...)
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History of Table Alterations

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