{"id":10325,"date":"2026-01-01T20:24:14","date_gmt":"2026-01-01T12:24:14","guid":{"rendered":"http:\/\/www.jointchina.com\/index.php\/uncategorized\/10325\/"},"modified":"2026-01-01T20:24:14","modified_gmt":"2026-01-01T12:24:14","slug":"oracle%e6%95%b0%e6%8d%ae%e5%ba%93%e6%81%a2%e5%a4%8d%e5%ae%9e%e6%88%98%e6%8c%87%e5%8d%97%ef%bc%9a%e5%85%b3%e9%94%ae%e6%97%b6%e5%88%bb%e6%95%91%e4%bd%a0%e4%b8%80%e5%91%bd%ef%bc%81","status":"publish","type":"post","link":"http:\/\/www.jointchina.com\/index.php\/new\/10325\/","title":{"rendered":"Oracle\u6570\u636e\u5e93\u6062\u590d\u5b9e\u6218\u6307\u5357\uff1a\u5173\u952e\u65f6\u523b\u6551\u4f60\u4e00\u547d\uff01"},"content":{"rendered":"<p>\u5357\u4eac\u6570\u636e\u6062\u590d<\/p>\n<p><\/p>\n<p>\u201c\u670d\u52a1\u5668\u5b95\u673a\u4e86\uff01\u201d\u3001\u201c\u8bef\u5220\u4e86\u751f\u4ea7\u8868\uff01\u201d\u3001\u201c\u5f52\u6863\u65e5\u5fd7\u4e22\u5931\u4e86\uff01\u201d\u2026 \u8fd9\u4e9b\u8ba9DBA\uff08\u6570\u636e\u5e93\u7ba1\u7406\u5458\uff09\u5fc3\u8df3\u9aa4\u505c\u7684\u77ac\u95f4\uff0c\u6700\u7ec8\u90fd\u6307\u5411\u540c\u4e00\u4e2a\u6838\u5fc3\u6551\u8d4e\u52a8\u4f5c\uff1a\u6062\u590d\u6570\u636e\u5e93\u3002\u8fdb\u51652025\u5e74\uff0c\u968f\u7740\u6838\u5fc3\u4e1a\u52a1\u7cfb\u7edf\u627f\u8f7d\u7684\u6570\u636e\u4ef7\u503c\u6108\u53d1\u60ca\u4eba\uff0c\u4e00\u6b21\u6210\u529f\u7684\u6062\u590d\u64cd\u4f5c\u4e0d\u4ec5\u5173\u4e4e\u6280\u672f\u80fd\u529b\uff0c\u66f4\u662f\u4f01\u4e1a\u751f\u5b58\u7684\u5e95\u7ebf\u3002\u5c3d\u7ba1Oracle\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u6062\u590d\u673a\u5236\uff08RMAN\u662f\u5176\u6838\u5fc3\u6b66\u5668\uff09\uff0c\u4f46\u5728\u9ad8\u538b\u73af\u5883\u4e0b\uff0c\u6e05\u6670\u3001\u7cbe\u51c6\u7684\u6062\u590d\u8bed\u53e5\u4e0e\u6d41\u7a0b\u638c\u63e1\uff0c\u4ecd\u7136\u662fDBA\u5fc5\u987b\u523b\u5728\u9aa8\u5b50\u91cc\u7684\u6280\u80fd\u3002\u672c\u6587\u5c06\u7ed3\u5408\u9ad8\u9891\u5b9e\u6218\u573a\u666f\uff0c\u6df1\u5165\u89e3\u6790\u90a3\u4e9b\u5173\u952e\u7684Oracle\u6062\u590d\u8bed\u53e5\uff0c\u52a9\u4f60\u5728\u6570\u636e\u707e\u96be\u4e2d\u529b\u633d\u72c2\u6f9c\u3002<\/p>\n<p><\/p>\n<p><strong>\u57fa\u7840\u57fa\u77f3\uff1a\u638c\u63e1RMAN\u5e38\u89c4\u6062\u590d\u8bed\u53e5<\/strong><\/p>\n<p><\/p>\n<p>RMAN (Recovery Manager) \u662fOracle\u5b98\u65b9\u63a8\u8350\u4e14\u529f\u80fd\u6700\u5b8c\u5584\u7684\u5907\u4efd\u6062\u590d\u5de5\u5177\u3002\u5b83\u7684\u4e00\u5927\u4f18\u52bf\u5728\u4e8e\u5176\u5907\u4efd\u96c6\u4e0e\u6062\u590d\u8fc7\u7a0b\u7d27\u5bc6\u5173\u8054\uff0c\u5927\u5927\u7b80\u5316\u4e86\u64cd\u4f5c\u30022025\u5e74\uff0c\u57fa\u4e8eRMAN\u7684\u5b8c\u6574\u6062\u590d\uff08Complete Recovery\uff09\u548c\u57fa\u4e8e\u65f6\u95f4\u70b9\u7684\u4e0d\u5b8c\u5168\u6062\u590d\uff08Point-in-Time Recovery, PITR\uff09\u4ecd\u662f\u4e3b\u6d41\u573a\u666f\u3002\u5f53\u4f60\u9700\u8981\u5b8c\u6574\u6062\u590d\u6574\u4e2a\u6570\u636e\u5e93\u5230\u5907\u4efd\u7ed3\u675f\u65f6\u7684\u4e00\u81f4\u6027\u72b6\u6001\uff0c\u6700\u57fa\u672c\u7684\u547d\u4ee4\u6781\u5176\u7b80\u6d01\uff1a<code>RESTORE DATABASE; RECOVER DATABASE;<\/code>\u3002\u8fd9\u7ec4\u547d\u4ee4\u4f7f\u7528<code>RESTORE<\/code>\u5c06\u6570\u636e\u5e93\u6587\u4ef6\u4ece\u6700\u8fd1\u7684\u5907\u4efd\u96c6\uff08\u65e0\u8bba\u662f\u5168\u5907\u8fd8\u662f\u589e\u91cf\u5907\u4efd\uff09\u8fd8\u539f\u5230\u76ee\u6807\u4f4d\u7f6e\uff0c\u7d27\u63a5\u7740<code>RECOVER<\/code>\u547d\u4ee4\u4f1a\u5e94\u7528\u6240\u6709\u53ef\u7528\u7684\u5f52\u6863\u65e5\u5fd7\u6587\u4ef6\u548c\u5728\u7ebf\u65e5\u5fd7\u6587\u4ef6\uff0c\u5c06\u6570\u636e\u5e93\u63a8\u8fdb\u5230\u6700\u65b0\u72b6\u6001\uff08\u6216\u76f4\u5230\u53d1\u751f\u6545\u969c\u524d\u7684\u90a3\u4e00\u523b\uff09\u3002<\/p>\n<p><\/p>\n<p>\u5b9e\u9645\u64cd\u4f5c\u73af\u5883\u5f80\u5f80\u66f4\u52a0\u590d\u6742\u3002\uff0c\u5f53\u6545\u969c\u53ea\u5f71\u54cd\u7279\u5b9a\u8868\u7a7a\u95f4\u6216\u6570\u636e\u6587\u4ef6\u65f6\uff0c\u5168\u5e93\u6062\u590d\u663e\u5f97\u8fc7\u4e8e\u201c\u91cd\u201d\u4e14\u8017\u65f6\u3002\u8fd9\u65f6\uff0c<code>RESTORE TABLESPACE users; RECOVER TABLESPACE users;<\/code>\u8fd9\u7c7b\u547d\u4ee4\u5c31\u81f3\u5173\u91cd\u8981\u3002\u5b83\u80fd\u7cbe\u51c6\u5b9a\u4f4d\u5e76\u6062\u590d\u51fa\u95ee\u9898\u7684\u8868\u7a7a\u95f4\uff08\u5982`users`\uff09\uff0c\u5927\u5e45\u7f29\u77ed\u6062\u590d\u65f6\u95f4\u7a97\u53e3\uff08RTO\uff09\u3002\u540c\u6837\uff0c\u9488\u5bf9\u5355\u4e2a\u6570\u636e\u6587\u4ef6\uff08\u5982\u635f\u574f\u7684`\/u01\/oradata\/ORCL\/users01.dbf`\uff09\uff0c\u4f7f\u7528<code>RESTORE DATAFILE '\/u01\/oradata\/ORCL\/users01.dbf'; RECOVER DATAFILE '\/u01\/oradata\/ORCL\/users01.dbf';<\/code>\u5219\u66f4\u4e3a\u9ad8\u6548\u3002\u7406\u89e3\u5e76\u719f\u7ec3\u8fd0\u7528\u8fd9\u79cd\u9897\u7c92\u5ea6\u6062\u590d\uff0c\u662f2025\u5e74\u9ad8\u6548\u8fd0\u7ef4\u7684\u6807\u914d\u3002<\/p>\n<p><\/p>\n<p><strong>\u5e94\u5bf9\u707e\u96be\uff1a\u5f52\u6863\u65e5\u5fd7\u4e22\u5931\u4e0e\u4e0d\u5b8c\u5168\u6062\u590d\u7684\u7cbe\u8981<\/strong><\/p>\n<p><\/p>\n<p>\u6700\u4ee4\u4eba\u5fc3\u60b8\u7684\u6062\u590d\u573a\u666f\u4e4b\u4e00\uff0c\u83ab\u8fc7\u4e8e\u5f52\u6863\u65e5\u5fd7\u5e8f\u5217\u51fa\u73b0\u7f3a\u53e3\u3002\u4e5f\u8bb8\u78c1\u76d8\u635f\u574f\uff0c\u4e5f\u8bb8\u7ba1\u7406\u758f\u5ffd\uff0c\u5bfc\u81f4\u6062\u590d\u6240\u9700\u7684\u67d0\u4e2a\u6216\u67d0\u4e9b\u5f52\u6863\u65e5\u5fd7\u7f3a\u5931\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u57fa\u4e8eSCN\uff08System Change Number\uff09\u6216\u786e\u5207\u65f6\u95f4\u70b9\u7684\u4e0d\u5b8c\u5168\u6062\u590d\uff08PITR\uff09\u6210\u4e3a\u552f\u4e00\u53ef\u884c\u7684\u9009\u62e9\uff0c\u76ee\u7684\u662f\u5c06\u6570\u636e\u5e93\u6062\u590d\u5230\u65e5\u5fd7\u5e8f\u5217\u5b8c\u6574\u53ef\u7528\u7684\u4e00\u4e2a\u4e00\u81f4\u6027\u72b6\u6001\u3002\u547d\u4ee4\u6838\u5fc3\u662f\uff1a<code>RESTORE DATABASE UNTIL SCN 1234567; RECOVER DATABASE UNTIL SCN 1234567;<\/code> \u6216 <code>RESTORE DATABASE UNTIL TIME \"TO_DATE('2025-07-01 14:30:00', 'YYYY-MM-DD HH24:MI:SS')\"; RECOVER DATABASE UNTIL TIME \"TO_DATE('2025-07-01 14:30:00', 'YYYY-MM-DD HH24:MI:SS')\";<\/code>\u3002\u8fd9\u91cc\u7684\u5173\u952e\u5728\u4e8e\u786e\u5b9a\u51c6\u786e\u7684\u6062\u590d\u7ec8\u70b9\uff08UNTIL SCN\u6216UNTIL TIME\uff09\u3002<\/p>\n<p><\/p>\n<p>\u4e0d\u5b8c\u5168\u6062\u590d\u5b8c\u6210\u540e\uff0c\u6570\u636e\u5e93\u4f1a\u5904\u4e8e\u4e00\u79cd\u7279\u6b8a\u72b6\u6001\uff0c\u5fc5\u987b\u4f7f\u7528<code>RESETLOGS<\/code>\u9009\u9879\u6253\u5f00\u6570\u636e\u5e93\uff1a<code>ALTER DATABASE OPEN RESETLOGS;<\/code>\u3002\u8fd9\u4e2a\u64cd\u4f5c\u4f1a\u91cd\u7f6e\u5728\u7ebf\u65e5\u5fd7\u5e8f\u5217\u53f7\uff0c\u5f00\u542f\u4e00\u4e2a\u65b0\u7684\u6570\u636e\u5e93\u201c\u5316\u8eab\u201d\uff08Incarnation\uff09\u3002\u8fd9\u662fOracle\u4fdd\u8bc1\u6570\u636e\u903b\u8f91\u4e00\u81f4\u6027\u7684\u5173\u952e\u673a\u5236\u3002\u57282025\u5e74\u590d\u6742\u7684\u591a\u73af\u5883\uff08\u5f00\u53d1\u3001\u6d4b\u8bd5\u3001\u707e\u5907\uff09\u540c\u6b65\u573a\u666f\u4e0b\uff0c\u6e05\u6670\u7ba1\u7406\u6570\u636e\u5e93\u5316\u8eab\u4fe1\u606f\u53d8\u5f97\u5c24\u4e3a\u91cd\u8981\uff0c\u5c24\u5176\u662f\u5728\u642d\u5efa\u6216\u91cd\u5efaStandby\u6570\u636e\u5e93\u65f6\u3002\u5207\u8bb0\uff0c\u6267\u884c<code>OPEN RESETLOGS<\/code>\u540e\uff0c\u5e94\u7acb\u5373\u8fdb\u884c\u5168\u91cf\u5907\u4efd\uff01<\/p>\n<p><\/p>\n<p><strong>\u75db\u70b9\u7834\u89e3\uff1a\u95ea\u56de\u6280\u672f\u52a0\u6301\u7684\u5feb\u901f\u7cbe\u51c6\u6062\u590d<\/strong><\/p>\n<p><\/p>\n<p>\u5bf9\u4e8e\u50cf\u201c\u8bef\u5220\u4e86\u521a\u63d0\u4ea4\u7684\u91cd\u8981\u6570\u636e\u201d\u6216\u201c\u9519\u8bef\u7684\u6279\u5904\u7406\u64cd\u4f5c\u5bfc\u81f4\u6570\u636e\u9519\u8bef\u201d\u8fd9\u7c7b\u7528\u6237\u7ea7\u9519\u8bef\uff0c\u4f20\u7edf\u7684\u57fa\u4e8e\u5907\u4efd\u6062\u590d\u8017\u65f6\u4e14\u5f71\u54cd\u8303\u56f4\u5927\u30022025\u5e74\uff0cOracle\u7684\u95ea\u56de\uff08Flashback\uff09\u6280\u672f\u5728\u6b64\u7c7b\u573a\u666f\u4e2d\u5927\u653e\u5f02\u5f69\uff0c\u582a\u79f0\u201c\u65f6\u95f4\u5012\u6d41\u201d\u7684\u795e\u5668\u3002\u5176\u4e2d\uff0c<code>FLASHBACK TABLE<\/code> \u662f\u6700\u5e38\u7528\u7684\u5feb\u901f\u6062\u590d\u624b\u6bb5\u3002\uff0c\u6062\u590d\u8868`important_table`\u523010\u5206\u949f\u524d\u7684\u72b6\u6001\uff1a<code>FLASHBACK TABLE important_table TO TIMESTAMP SYSTIMESTAMP - INTERVAL '10' MINUTE;<\/code>\u3002\u8fd9\u6761\u8bed\u53e5\u5728\u51e0\u79d2\u5230\u51e0\u5206\u949f\u5185\u5c31\u80fd\u5b8c\u6210\u4efb\u52a1\uff0c\u4e1a\u52a1\u51e0\u4e4e\u65e0\u611f\u77e5\u3002<\/p>\n<p><\/p>\n<p>\u5f53\u6d89\u53ca\u6574\u4e2a\u6570\u636e\u5e93\u56e0\u903b\u8f91\u9519\u8bef\u800c\u9700\u8981\u56de\u9000\uff0c\u6216\u8005\u8981\u514b\u9686\u4e00\u4e2a\u7279\u5b9a\u65f6\u95f4\u70b9\u7684\u6570\u636e\u5b50\u96c6\uff0c\u5c31\u9700\u8981\u6570\u636e\u5e93\u7ea7\u522b\u7684\u95ea\u56de\u80fd\u529b\uff1a<code>FLASHBACK DATABASE<\/code>\u3002\u8fd9\u8981\u6c42\u6570\u636e\u5e93\u5fc5\u987b\u5904\u4e8e\u5f52\u6863\u6a21\u5f0f\u4e14\u542f\u7528\u4e86\u95ea\u56de\u65e5\u5fd7\uff08Flashback Logs\uff09\u3002\u547d\u4ee4\u5982\uff1a<code>FLASHBACK DATABASE TO TIMESTAMP TO_TIMESTAMP('2025-07-01 12:00:00', 'YYYY-MM-DD HH24:MI:SS');<\/code>\u3002\u5176\u6838\u5fc3\u662f\u5229\u7528\u95ea\u56de\u65e5\u5fd7\u5feb\u901f\u56de\u6eda\u53d8\u66f4\uff0c\u901f\u5ea6\u8fdc\u5feb\u4e8e\u5e94\u7528\u65e5\u5fd7\u7684\u4f20\u7edf\u6062\u590d\u3002\u4f46\u52a1\u5fc5\u6ce8\u610f\uff0c\u95ea\u56de\u6570\u636e\u5e93\u5b8c\u6210\u540e\u4e5f\u9700\u8981\u7528<code>RESETLOGS<\/code>\u65b9\u5f0f\u6253\u5f00\uff0c\u5e76\u7acb\u5373\u5907\u4efd\u30022025\u5e74\uff0c\u5408\u7406\u914d\u7f6e\u95ea\u56de\u6062\u590d\u533a\uff08Flash Recovery Area\uff09\u5927\u5c0f\uff0c\u7ed3\u5408\u81ea\u52a8\u5316\u7684\u95ea\u56de\u7b56\u7565\uff0c\u5df2\u6210\u4e3a\u5173\u952e\u4e1a\u52a1\u7cfb\u7edf\u6570\u636e\u4fdd\u62a4\u7684\u9ec4\u91d1\u7ec4\u5408\u3002<\/p>\n<p><\/p>\n<p><strong>\u4e0e\u5b89\u5168\u9600\u95e8<\/strong><\/p>\n<p><\/p>\n<p>\u65e0\u8bba\u662f\u4f20\u7edfRMAN\u6062\u590d\u8fd8\u662f\u95ea\u56de\u6280\u672f\uff0c\u5176\u6709\u6548\u6027\u90fd\u4e25\u91cd\u4f9d\u8d56\u4e8e\u5065\u5eb7\u7684\u5907\u4efd\u7b56\u7565\u4e0e\u914d\u7f6e\u30022025\u5e74\u7684\u6700\u4f73\u5b9e\u8df5\u5305\u62ec\uff1a\u4e25\u683c\u9075\u5faa\u5907\u4efd\u4fdd\u7559\u7b56\u7565\u3001\u5b9a\u671f\u4f7f\u7528<code>VALIDATE BACKUP<\/code>\u547d\u4ee4\u6821\u9a8c\u5907\u4efd\u96c6\u53ef\u7528\u6027\u3001\u786e\u4fdd\u5f52\u6863\u65e5\u5fd7\u7684\u5b89\u5168\u4f20\u8f93\u4e0e\u5b58\u50a8\u3001\u4ee5\u53ca\u5408\u7406\u7684\u95ea\u56de\u6062\u590d\u533a\u914d\u7f6e\u3002\u5728\u6267\u884c\u4efb\u4f55\u6062\u590d\u64cd\u4f5c\u4e4b\u524d\uff0c\u5c24\u5176\u662f\u5728\u751f\u4ea7\u73af\u5883\uff0c\u5f3a\u70c8\u5efa\u8bae\u5148\u5728\u9694\u79bb\u7684\u6d4b\u8bd5\u73af\u5883\u8fdb\u884c\u6f14\u7ec3\u3002\u7262\u8bb0\u6838\u5fc3\u8bed\u53e5\u6846\u67b6\uff08<code>RESTORE<\/code> + <code>RECOVER<\/code> + <code>OPEN<\/code>\uff09\uff0c\u7406\u89e3\u4e0d\u540c\u6062\u590d\u573a\u666f\uff08\u5b8c\u5168\u3001\u4e0d\u5b8c\u5168\u3001\u95ea\u56de\uff09\u7684\u9009\u62e9\u4f9d\u636e\uff0c\u5e76\u517b\u6210\u64cd\u4f5c\u540e\u7acb\u5373\u9a8c\u8bc1\u548c\u5907\u4efd\u7684\u4e60\u60ef\uff0c\u624d\u80fd\u5728\u6570\u636e\u5371\u673a\u771f\u6b63\u964d\u4e34\u90a3\u4e00\u523b\uff0c\u771f\u6b63\u505a\u5230\u80f8\u6709\u6210\u7af9\uff0c\u5316\u9669\u4e3a\u5937\u3002<\/p>\n<p><\/p>\n<p><strong>\u95ee\u98981\uff1a\u8bef\u5220\u4e86\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u8868\u683c\uff0c\u5e76\u4e14\u5df2\u7ecf\u63d0\u4ea4\u4e86\u4e8b\u52a1\uff0c\u6700\u5feb\u7684\u6062\u590d\u65b9\u6cd5\u662f\u4ec0\u4e48\uff1f<\/strong><br \/>\n\u7b54\uff1a\u6700\u5feb\u7684\u6062\u590d\u65b9\u6cd5\u662f\u4f7f\u7528Oracle\u7684<code>FLASHBACK TABLE<\/code>\u8bed\u53e5\u3002\u53ea\u8981\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\uff1a1\uff09\u6570\u636e\u5e93\u542f\u7528\u4e86\u95ea\u56de\u529f\u80fd\uff1b2\uff09\u88ab\u5220\u9664\u7684\u6570\u636e\u4ecd\u5728UNDO\u8868\u7a7a\u95f4\u7684\u4fdd\u7559\u65f6\u95f4\u6216\u95ea\u56de\u65e5\u5fd7\u8986\u76d6\u7684\u65f6\u95f4\u8303\u56f4\u5185\uff1b3\uff09\u4f60\u62e5\u6709\u5fc5\u8981\u7684\u6743\u9650\uff08\u5982FLASHBACK ANY TABLE\uff09\u3002\uff0c\u8981\u6062\u590d<code>critical_data<\/code>\u8868\u52305\u5206\u949f\u524d\u7684\u72b6\u6001\uff0c\u53ef\u4ee5\u6267\u884c\uff1a<code>FLASHBACK TABLE critical_data TO TIMESTAMP (SYSTIMESTAMP - INTERVAL '5' MINUTE);<\/code>\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u901a\u5e38\u5728\u79d2\u7ea7\u5230\u5206\u949f\u7ea7\u5b8c\u6210\uff0c\u5bf9\u5728\u7ebf\u4e1a\u52a1\u5f71\u54cd\u6700\u5c0f\u3002\u5982\u679c\u8868\u7ed3\u6784\u4e5f\u88ab\u5220\u9664\uff08DDL\u64cd\u4f5c\uff09\uff0c\u5219\u6b64\u65b9\u6cd5\u4e0d\u9002\u7528\uff0c\u9700\u4f7f\u7528\u66f4\u590d\u6742\u7684\u4e0d\u5b8c\u5168\u6062\u590d\u6216\u4ece\u903b\u8f91\u5907\u4efd\uff08\u5982Data Pump\uff09\u5bfc\u5165\u3002<\/p>\n<p><\/p>\n<p><strong>\u95ee\u98982\uff1a\u6267\u884c\u4e0d\u5b8c\u5168\u6062\u590d\uff08PITR\uff09\u540e\uff0c\u4e3a\u4ec0\u4e48\u5fc5\u987b\u4f7f\u7528<code>ALTER DATABASE OPEN RESETLOGS<\/code>\uff1f<\/strong><br \/>\n\u7b54\uff1a\u5728Oracle\u4e2d\u6267\u884c\u4e0d\u5b8c\u5168\u6062\u590d\uff08\u5373\u6062\u590d\u5230\u8fc7\u53bb\u7684\u67d0\u4e2a\u65f6\u95f4\u70b9\u6216SCN\uff09\uff0c\u4f1a\u4f7f\u5f97\u6570\u636e\u5e93\u7684\u903b\u8f91\u65f6\u95f4\u7ebf\uff08SCN\u5e8f\u5217\uff09\u4e0e\u7269\u7406\u6062\u590d\u70b9\u4e4b\u540e\u7684\u65e5\u5fd7\u5e8f\u5217\u4ea7\u751f\u65ad\u88c2\u548c\u4e0d\u8fde\u7eed\u6027\u3002\u4f7f\u7528<code>OPEN RESETLOGS<\/code>\u547d\u4ee4\u7684\u4f5c\u7528\u662f\uff1a1\uff09\u5f3a\u5236\u91cd\u7f6e\u5728\u7ebf\u91cd\u505a\u65e5\u5fd7\uff08Online Redo Logs\uff09\u7684\u5e8f\u5217\u53f7\uff08sequence\uff09\u4ece1\u5f00\u59cb\u8ba1\u6570\uff1b2\uff09\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u3001\u552f\u4e00\u7684\u6570\u636e\u5e93\u5316\u8eab\uff08Database Incarnation\uff09\u3002\u8fd9\u76f8\u5f53\u4e8e\u4e3a\u6570\u636e\u5e93\u5f00\u542f\u4e86\u4e00\u4e2a\u5168\u65b0\u7684\u3001\u72ec\u7acb\u7684\u5386\u53f2\u5206\u652f\uff0c\u5f7b\u5e95\u65ad\u7edd\u4e86\u4e0e\u65e7\u6709\u65e5\u5fd7\u5e8f\u5217\u7684\u5173\u8054\uff0c\u4ece\u800c\u4fdd\u8bc1\u4e86\u6570\u636e\u5e93\u5728\u6253\u5f00\u540e\u6570\u636e\u72b6\u6001\u7684\u4e00\u81f4\u6027\uff0c\u907f\u514d\u540e\u7eed\u65e5\u5fd7\u5e94\u7528\u65f6\u53d1\u751f\u903b\u8f91\u51b2\u7a81\u3002\u8fd9\u662fOracle\u4fdd\u8bc1\u5728\u4e0d\u5b8c\u5168\u6062\u590d\u540e\u6570\u636e\u903b\u8f91\u4e00\u81f4\u6027\u7684\u5173\u952e\u5b89\u5168\u673a\u5236\u3002\u6267\u884c\u6b64\u64cd\u4f5c\u540e\uff0c\u52a1\u5fc5\u5907\u4efd\u6570\u636e\u5e93\uff0c\u56e0\u4e3a\u65e7\u7684\u5907\u4efd\u548c\u5f52\u6863\u65e5\u5fd7\u5c06\u65e0\u6cd5\u7528\u4e8e\u65b0\u5316\u8eab\u6570\u636e\u5e93\u7684\u6062\u590d\u3002<\/p>\n<p><\/p>\n<p>\u897f\u6570\u79d1\u6280\u6570\u636e\u6062\u590d  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