好久没有写blog了，好有亲切感，一次闪回的测试，共享一下，呵呵
SQL> alter table emp enable row movement;
Table altered
SQL> insert into emp select * from scott.emp;
14 rows inserted
SQL> commit;
Commit complete
SQL> select sysdate from dual;
SYSDATE
--------------------
2007-3-11 17:59:56
SQL> delete from emp where rownum<10;
9 rows deleted
SQL> commit;
Commit complete
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
7876 ADAMS CLERK 7788 1987-5-23 1100.00 20
7900 JAMES CLERK 7698 1981-12-3 950.00 30
7902 FORD ANALYST 7566 1981-12-3 3000.00 20
7934 MILLER CLERK 7782 1982-1-23 1300.00 10
7369 SMITH CLERK 7902 1980-12-17 800.00 20
SQL> select sysdate from dual;
SYSDATE
--------------------
2007-3-11 18:00:22
SQL> delete from emp;
5 rows deleted
SQL> commit;
Commit complete
SQL> flashback table emp to timestamp to_timestamp('2007-3-11 18:00:22','yyyy-mm-dd hh24:mi:ss');
Done
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
7876 ADAMS CLERK 7788 1987-5-23 1100.00 20
7900 JAMES CLERK 7698 1981-12-3 950.00 30
7902 FORD ANALYST 7566 1981-12-3 3000.00 20
7934 MILLER CLERK 7782 1982-1-23 1300.00 10
7369 SMITH CLERK 7902 1980-12-17 800.00 20
SQL>
SQL> flashback table emp to timestamp to_timestamp('2007-3-11 17:59:56','yyyy-mm-dd hh24:mi:ss');
Done
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
7499 ALLEN SALESMAN 7698 1981-2-20 1600.00 300.00 30
7521 WARD SALESMAN 7698 1981-2-22 1250.00 500.00 30
7566 JONES MANAGER 7839 1981-4-2 2975.00 20
7654 MARTIN SALESMAN 7698 1981-9-28 1250.00 1400.00 30
7698 BLAKE MANAGER 7839 1981-5-1 2850.00 30
7782 CLARK MANAGER 7839 1981-6-9 2450.00 10
7788 SCOTT ANALYST 7566 1987-4-19 3000.00 20
7839 KING PRESIDENT 1981-11-17 5000.00 10
7844 TURNER SALESMAN 7698 1981-9-8 1500.00 0.00 30
7876 ADAMS CLERK 7788 1987-5-23 1100.00 20
7900 JAMES CLERK 7698 1981-12-3 950.00 30
7902 FORD ANALYST 7566 1981-12-3 3000.00 20
7934 MILLER CLERK 7782 1982-1-23 1300.00 10
7369 SMITH CLERK 7902 1980-12-17 800.00 20
14 rows selected
SQL>
SQL>
SQL> flashback table emp to timestamp to_timestamp('2007-3-11 18:00:22','yyyy-mm-dd hh24:mi:ss');
Done
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
7876 ADAMS CLERK 7788 1987-5-23 1100.00 20
7900 JAMES CLERK 7698 1981-12-3 950.00 30
7902 FORD ANALYST 7566 1981-12-3 3000.00 20
7934 MILLER CLERK 7782 1982-1-23 1300.00 10
7369 SMITH CLERK 7902 1980-12-17 800.00 20
SQL>
SQL> select dbms_flashback.get_system_change_number from dual;
GET_SYSTEM_CHANGE_NUMBER
------------------------
611375
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
7876 ADAMS CLERK 7788 1987-5-23 1100.00 20
7900 JAMES CLERK 7698 1981-12-3 950.00 30
7902 FORD ANALYST 7566 1981-12-3 3000.00 20
7934 MILLER CLERK 7782 1982-1-23 1300.00 10
7369 SMITH CLERK 7902 1980-12-17 800.00 20
SQL> delete from emp;
5 rows deleted
SQL> select dbms_flashback.get_system_change_number from dual;
GET_SYSTEM_CHANGE_NUMBER
------------------------
611383
SQL>
SQL>
SQL> flashback table emp to scn 611375;
Done
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
7876 ADAMS CLERK 7788 1987-5-23 1100.00 20
7900 JAMES CLERK 7698 1981-12-3 950.00 30
7902 FORD ANALYST 7566 1981-12-3 3000.00 20
7934 MILLER CLERK 7782 1982-1-23 1300.00 10
7369 SMITH CLERK 7902 1980-12-17 800.00 20
SQL>
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