爱游戏平台登录入口

  • Oracle爱游戏平台登录入口sys和system的区分小结
  • 2018年02月25日
  • 搜集搜集
1.
SYS用户具备DBA权爱游戏平台登录入口,并且具备SYS形式,只能经由过程SYSDBA登岸数据库。是Oracle数据库爱游戏平台登录入口权爱游戏平台登录入口最高的帐号
SYSTEM具备DBA权爱游戏平台登录入口。但不SYSDBA权爱游戏平台登录入口。泛泛普通用该帐号办理数据库就能够了。
2.
(1)sys -- sysdba
system --sysoper
(2)startup/shutdown/dba办理两个爱游戏平台登录入口能做

(3)sys具备数据字典(dictionay),或说dictionay属于sys schema

(4)sysdba比sysoper多了一个create database的权爱游戏平台登录入口
3.
SYSDBA
Perform STARTUP and SHUTDOWN operations
ALTER DATABASE: open, mount, back up, or change character set
CREATE DATABASE
CREATE SPFILE
ARCHIVELOG and RECOVERY
Includes the RESTRICTED SESSION privilege
Effectively, this system privilege allows a user to connect as user SYS.
SYSOPER
Perform STARTUP and SHUTDOWN operations
CREATE SPFILE
ALTER DATABASE OPEN/MOUNT/BACKUP
ARCHIVELOG and RECOVERY
Includes the RESTRICTED SESSION privilege
This privilege allows a user to perform basic operational tasks, but without the ability to look at user data