--콘솔에서 sysdba 로 접속
C:>sqlplus "/as sysdba"
SQL> show user
USER is "SYS"
 

--암호 재설정
SQL> alter user sys identified by 암호;
SQL> alter user system identified by 암호;
 

--접속 확인 
SQL> connect sys/암호 as sysdba
SQL> connect systemp/암호  




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