Bagaimana cara mengembalikan perubahan DB saya setelah komit?

Anda dapat melakukannya menggunakan Kilas balik fitur.

1.Kilas balik oleh SCN

SELECT column_list
FROM table_name
AS OF SCN scn_number;

2.Kilas balik menurut TIMESTAMP

SELECT column_list
FROM table_name
AS OF TIMESTAMP TO_TIMESTAMP('the timestamp value');

Untuk mendapatkan current_scn dan systimestamp, kueri :

SELECT current_scn, SYSTIMESTAMP
FROM v$database;

Mari kita lihat contohnya :

Untuk mem-flashback tabel ke scn lama, gunakan FLASHBACK TABLE..TO SCN klausa.

SQL> DROP TABLE string_ex PURGE;

Table dropped.

SQL> CREATE TABLE string_ex (sl_ps_code VARCHAR2(20) );

Table created.

SQL> INSERT INTO string_ex (sl_ps_code) VALUES ('AR14ASM0002');

1 row created.

SQL> INSERT INTO string_ex (sl_ps_code) VALUES ('AR14SFT0018');

1 row created.

SQL> INSERT INTO string_ex (sl_ps_code) VALUES ('AR14SFT0019');

1 row created.

SQL> INSERT INTO string_ex (sl_ps_code) VALUES ('AR14SFT0062');

1 row created.

SQL> COMMIT;

Commit complete.

SQL> SELECT current_scn, SYSTIMESTAMP FROM v$database;

         CURRENT_SCN SYSTIMESTAMP
-------------------- --------------------------------------------
      13818123201277 29-OCT-14 03.02.17.419000 PM +05:30

SQL> SELECT current_scn, SYSTIMESTAMP FROM v$database;

         CURRENT_SCN SYSTIMESTAMP
-------------------- --------------------------------------------
      13818123201280 29-OCT-14 03.02.22.785000 PM +05:30

SQL> SELECT current_scn, SYSTIMESTAMP FROM v$database;

         CURRENT_SCN SYSTIMESTAMP
-------------------- --------------------------------------------
      13818123201282 29-OCT-14 03.02.26.781000 PM +05:30

SQL> SELECT * FROM string_ex;

SL_PS_CODE
---------------
AR14ASM0002
AR14SFT0018
AR14SFT0019
AR14SFT0062

SQL>

Saya memiliki empat baris dalam tabel .

SQL> ALTER TABLE string_ex ENABLE ROW MOVEMENT;

Table altered.

SQL>

Pergerakan baris diperlukan.

SQL> DELETE FROM string_ex WHERE ROWNUM =1;

1 row deleted.

SQL>
SQL> COMMIT;

Commit complete.

SQL>
SQL> SELECT * FROM string_ex;

SL_PS_CODE
---------------
AR14SFT0018
AR14SFT0019
AR14SFT0062

Saya menghapus satu baris sekarang dan melakukan perubahan.

SQL> FLASHBACK TABLE string_ex TO SCN 13818123201277;

Flashback complete.

Kilas balik selesai

SQL> SELECT * FROM string_ex;

SL_PS_CODE
---------------
AR14ASM0002
AR14SFT0018
AR14SFT0019
AR14SFT0062

SQL>

Sekarang saya memiliki meja saya ke keadaan lama dan barisnya kembali