sysdba和sysoper 角色的区别

1.  sysoper: This privilege allows a user to perform basic operational tasks, but without the ability to look at user data.

2.  sysoper:  ALTER DATABASE RECOVER 

                      (Complete recovery only. Any form of incomplete recovery, such as UNTIL TIME|CHANGE|CANCEL|CONTROLFILE requires connecting as SYSDBA.)

3.   SQL> conn / as sysoper
      SQL> show user
               USER is "PUBLIC"

      SQL> conn / as sysdba
 
      SQL> show user
               USER is "SYS"