尚硅谷Oracle教程-学习笔记2

控制用户权限

1.创建用户

1)

SQL> create user atguigu01
  2  identified by atguigu01;
User created

2)

SQL> grant create session
  2  to atguigu01;
Grant succeeded

3)

SQL> grant create table
  2  to atguigu01;
Grant succeeded

4)

SQL> alter user atguigu01 quota 5m
  2  on users;
User altered

2.创建角色

1)

SQL> create role my_role;
Role created

2)

SQL> grant create session,create table,create view to my_role;
Grant succeeded

3)

SQL> create user atguigu02
  2  identified by atguigu02;
User created

4)

SQL> grant my_role to atguigu02;
Grant succeeded
SQL> 

3.使用GRANT 和 REVOKE 语句赋予和回收权限

1)

SQL> grant select,update
  2  on scott.employees
  3  to atguigu01;
Grant succeeded

2)

SQL> grant select 
  2  on scott.departments
  3  to atguigu01
  4  with grant option;
Grant succeeded

3)

SQL> grant select,update
  2  on locations
  3  to public;
Grant succeeded

4)

SQL> revoke select 
  2  on employees
  3  from atguigu01;
Revoke succeeded

作业:

  • 1.如果用户能够登陆到数据库,至少需要哪种权限?是系统权限还是对象权限
    CREATE SESSION 系统权限
  • 2.创建表需要哪种权限?
    CREATE TABLE
  • 3.将表departments的查询权限分配给用户system
Grant select 
on departments
to system;
  • 4.从system处收回刚才赋予的权限
REVOKE select
on departments
from system;
  • 5.创建角色dvp,并将如下权限赋予该角色
     CREATE PROCEDURE
     CREATE SESSION
     CREATE TABLE
     CREATE SEQUENCE
     CREATE VIEW
    1)
CREATE ROLE dvp;

2)

GRANT CREATE PROCEDURE,CREATE SESSION,CREATE TABLE,CREATE SEQUENCE,CREATE VIEW
TO dvp;
posted @ 2017-11-07 20:30  Shinesu  阅读(666)  评论(0编辑  收藏  举报