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【oracle11g,11】redo日誌檔案2 :日誌恢復 (重點)

用alter database clear logfile命令嘗試重構logfile group 1,失敗; SQL> alter database clear logfile group 1; alter database clear logfile group 1 * ERROR at line 1: ORA-00350: log 1 of instance orcl (thread 1) needs to be archived ORA-00312: online log 1 thread 1: '/u02/oradata/orcl/redo01.log' 失敗的原因是group 1還沒有歸檔,需要加上”unarchived”引數; SQL> alter database clear unarchived logfile group 1; Database altered.