Overview of SYS and SYSTEM Users in Oracle
Basically sys and system user called database administrator users The users are created during database installation Both users are automatically granted the DBA role SYS User Sys user can perform all admin operations Owner of the database and data dictionary All base tables and views of the database and dictionary’s stores sys schema When connecting the sys user. Its should be made the sysdba or sysoper privileges Connect sqlplus / as sysdba Sysdba and sysoper users to perform high level of admin tasks Ex : Backup and recovery Startup and shutdown Alter database open/mount Alter database Archivelog/Noarchivelog SYSTEM User Owner of the additional internal tables and views System user perform all admin tasks except DB upgrade, backup and recovery Default password is manager They contain administrative information used by the oracle tools. Connect syatem/manager Note: For security reasons the defaul