Oracle sqlplus/as sysdba command details

Enter "sqlplus/as sysdba" in the Command window and press enter to connect to Oracle, for example, C: \> sqlplus/as sysdba SQL * Plus: release 11.2.0.1.0 Production on Tuesday April 17 10:05:34 2012 Copyright (c) 1982,201 0, Oracle. all rights reserved. connect to www.2cto.com: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0-ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing options SQL>, after logging on to the system, enter "select user from dual;" to view the following result: C: \> sqlplus/as sysdba SQL * Plus: release 11.2.0.1.0 Production on Tuesday April 17 10:11:11 2012 Copyright (c) 1982,201 0, Oracle. all rights reserved. connect:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0-ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing options www.2cto.com SQL> select user from dual; USER------------------------------SYS SQL> obviously we just logged in as SYS user, which indicates that the user name and password are omitted here. We then use "sqlplus sys/*** (sys user password) /as sysdba login, regardless of whether the user name or password exists in the system can be normal login, login user or "SYS", the command operation is as follows: C: \> sqlplus sss/sss as sysdba SQL * Plus: Release 11.2.0.1.0 Production on Tuesday April 17 10:21:12 2012 Copyright (c) 1982,201 0, Oracle. all rights reserved. connect to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0-ProductionWith the Partitioning, OLAP, Data Mining, and Real Application Testing options www.2cto.com SQL> select user from dual; USER------------------------------SYS SQL> command details: the user name/ The password is the same as not entered. From the column ZHOUJIAOSHOU