在数据库运行的时候,数据库系统的SCN不断地增长:
SQL> select dbms_flashback.get_system_change_number from dual;
GET_SYSTEM_CHANGE_NUMBER
------------------------
1024279
SQL>
虽然在我的实验环境中,我什么都没有干,但是 SCN确实是不断增长的:
SQL> select dbms_flashback.get_system_change_number from dual;
GET_SYSTEM_CHANGE_NUMBER
------------------------
1024598
SQL>
Case Studies Of Backup And Recovery: An Insider Perspective (Doc ID 3291.1)