Oracle的用户、角色及权限相关操作

1、创建用户

create user KD identified by 123456;

2、授予连接数据库的权限

grant connect to KD;

3、将Scott用户的emp表授权给KD可以查询

grant select on scott.emp to KD;
grant create table to KD;

4、回收权限

revoke select on scott.emp from KD;

5、表的增删改权限授权

grant select,inset,delete,update on scott.emp to KD;
revoke select,inset,delete,update on scott.emp from KD;

6、删除用户

SQL 错误: ORA-01940: 无法删除当前连接的用户

退出已经连接得KD用户后再执行

drop user KD;

会提示：错误: ORA-01922: 必须指定 CASCADE 以删除 'KD'

drop user KD cascade;

7、查看当前用户所拥有的权限

select * from session_privs;

8、查看当前用户所拥有的角色

select * from user_role_privs;

9、查看角色所有的权限

select * from dba_sys_privs;
select * from dba_sys_privs where grantee='CONNECT';
--create session
select * from dba_sys_privs where grantee='RESOURCE';
/*
create trigger 
create sequence 
create type 
create procedure 
create cluster 
create operator 
create indextype 
create table
*/
select * from dba_sys_privs where grantee='DBA';
--有最高权限 所有的权限都有

创建一个开发人员并授权：

create user CURRY identified by 123456;
create connet,resource to CURRY;

10、用户解锁

alter user HR account unlock;

11、修改用户密码

alter user HR identified by 123456;