我正在使用 oracle 10g,我想启用闪回数据库我手动运行所有命令,如
SQL> shutdown immediate;
SQL> startup mount;
SQL> alter database archivelog;
SQL> ALTER SYSTEM SET DB_FLASHBACK_RETENTION_TARGET=4320;
SQL> ALTER SYSTEM SET DB_RECOVERY_FILE_DEST_SIZE=536870912;
SQL> ALTER SYSTEM SET DB_RECOVERY_FILE_DEST='/C/TEMP1';
SQL> ALTER DATABASE OPEN;
SQL>ALTER DATABASE FLASHBACK ON;
它显示了类似的错误
ORA-00439: feature not enabled : Flashback Database
请问有人可以帮我设置闪回数据库吗?