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(1).sqlplus "sys/zhb126 as sysdba"
(2).sqlplus/nolog connect sys/zhb126 as sysdba
(3).sqlplus scott/tiger
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shutdown abort--Ç¿ÖÆ¹Ø±Õ£¨Ààdb2µÄdb2 stop force£©
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archive log list
ALTER DATABASE archivelog
ALTER DATABASE OPEN
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help INDEX
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alter user scott account unlock;
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