宁愿跑起来被拌倒无数次,也不愿规规矩矩走一辈子,就算跌倒也要豪迈的笑。不管梦想是什么,只有带着淡然的态度,做好当前的事情。
1. SYS用户具有DBA权限,并且拥有SYS模式,只能通过SYSDBA登陆数据库。是Oracle数据库中权限最高的帐号
SYSTEM具有DBA权限。但没有SYSDBA权限。平常一般用该帐号管理数据库就可以了。
2.
(1)sys -- sysdba
system --sysoper
(2)startup/shutdown/dba管理两个都能做 (3)sys拥有数据字典(dictionay),或者说dictionay属于sys schema (4)sysdba比sysoper多了一个create database的权限
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
以上就是Oracle中sys和system的区别小结。把你的脸迎旭日光,那就不会有暗影。更多关于Oracle中sys和system的区别小结请关注haodaima.com其它相关文章!