查询数据库当前SCN

SQL> select current_scn from v$database;

CURRENT_SCN
-----------
    2014669

SQL> select dbms_flashback.get_system_change_number() from dual;

DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER()
-----------------------------------------
      2014684

SQL> select current_scn from v$database;

CURRENT_SCN
-----------
    2014691