如题
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SYS用户拥有SYSDBA权限,可以访问DBA视图(包含所有用户信息),包含了SYSTEM用户的所有权限;
SYSTEM用户拥有DBA权限,可以创建用户、管理表空间等,只能访问USER视图(只包含当前用户信息);
大致是这样。
另外有reman,snmp等用户
oracle 10g 默认安装带来的用户名/密码
User/pwd Desc.
-------------- ----------------------------------------------------------------------
CTXSYS/CTXSYS The Oracle Text account
Oracle Text Reference
DBSNMP/DBSNMP The account used by the Management Agent component of Oracle Enterprise Manager to monitor and manage the database
Oracle Enterprise Manager Grid Control Installation and Basic Configuration
LBACSYS/LBACSYS The Oracle Label Security administrator account
Oracle Label Security Administrator's Guide
MDDATA/MDDATA The schema used by Oracle Spatial for storing Geocoder and router data
Oracle Spatial User's Guide and Reference
MDSYS/MDSYS The Oracle Spatial and Oracle interMedia Locator administrator account
Oracle Spatial User's Guide and Reference
DMSYS/DMSYS The Oracle Data Mining account.
Oracle Data Mining Administrator's Guide/Oracle Data Mining Concepts
OLAPSYS/MANAGER The account used to create OLAP metadata structures. It owns the OLAP Catalog (CWMLite).
Oracle OLAP Application Developer's Guide
ORDPLUGINS/ORDPLUGINS The Oracle interMedia user. Plug-ins supplied by Oracle and third party
format plug-ins are installed in this schema.
Oracle interMedia User's Guide
ORDSYS/ORDSYS The Oracle interMedia administrator account
Oracle interMedia User's Guide
OUTLN/OUTLN The account that supports plan stability. Plan stability enables you
to maintain the same execution plans for the same SQL statements.
OUTLN acts as a role to centrally manage metadata associated with stored outlines.
Oracle Database Performance Tuning Guide
SI_INFORMTN_SCHEMA/SI_INFORMTN_SCHEMA
The account that stores the information views for the SQL/MM Still Image Standard
Oracle interMedia User's Guide
SYS/CHANGE_ON_INSTALL The account used to perform database administration tasks
Oracle Database Administrator's Guide
SYSMAN/CHANGE_ON_INSTALL The account used to perform Oracle Enterprise Manager database administration tasks. Note that SYS and SYSTEM can also perform these tasks.
Oracle Enterprise Manager Grid Control Installation and Basic Configuration
SYSTEM/MANAGER Another account used to perform database administration tasks