Finding changing data

Question

Hi,
i wanna ask that how could i find the changing data,
for example,
in 1st november i have 1 table student that contain 5 rows
ID NAME
1 student_one
3 student_three
6 student_six
7 student_seven
2 student_two
next few days, i add some rows. and in 3rd november the table become
ID NAME
1 student_one
3 student_three
6 student_six
7 student_seven
2 student_two
4 student_four
5 student_five
what i wanna ask is, how can i know what row has been added between those day?
(assumption that the rows is not added by me)
Thanks,
Hadi

Answer 1

Hi,
Now my question is, how can i insert the change data into a table?By usage of trigger before update/insert.
SQL> desc ttt
Name                                      Null?    Type
COL1                                               NUMBER
COL2                                               NUMBER
COL3                                               NUMBER
COL4                                               NUMBER
COL5                                               NUMBER
SQL> alter table ttt add (date_upd date);
Table altered.
SQL> ed
Wrote file afiedt.buf
  1  create trigger trg_ttt
  2  before update or insert on ttt
  3  for each row
  4  begin
  5  :new.date_upd := sysdate;
  6* end;
SQL> /
Trigger created.
SQL> insert into ttt (col1,col2,col3,col4,col5)
  2  select sum(col1), sum(col2),sum(col3),sum(col4),sum(col5)
  3  from ttt
  4  where col1 in (1,6)
  5  /
1 row created.
SQL> select * from ttt;
      COL1       COL2       COL3       COL4       COL5 DATE_UPD
         1          2          3          4          5
         6          7          8          9         10
        11         12         13         14         15
         7          9         11         13         15
         7          9         11         13         15 19/11/05
SQL> update ttt set col2 = 10 where col1 = 1;
1 row updated.
SQL> select * from ttt;
      COL1       COL2       COL3       COL4       COL5 DATE_UPD
         1         10          3          4          5 19/11/05
         6          7          8          9         10
        11         12         13         14         15
         7          9         11         13         15
         7          9         11         13         15 19/11/05
SQL> HTH,
Nicolas.
Message was edited by:
N. Gasparotto
Or, if you have one column to audit insert, and one more to audit update, you can create a trigger like following :
create or replace trigger trg_ttt
before update or insert on ttt
for each row
begin
if UPDATING then
     :new.date_upd := sysdate;
end if;
if INSERTING then
     :new.date_ins := sysdate;
end if;
end;
/