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  • 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;
    
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  • 原文地址:https://www.cnblogs.com/SweetZxl/p/7800662.html
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