oracle的用户

1：创建用户

create user zhaoyb identified by zhaoyb default tablespace HUAPUSALEDB

create user 用户名 identified by 密码 default tablespace 默认表空间

2：给用户授权

grant connect,sysdba  to zhaoyb
grant 角色 to 用户
grant connect,resource,create any view,create any synonym,create database link to 用户名;

3：收回权限

revoke connect from zhaoyb

revoke 角色 from 用户

4：删除用户

只删除用户
drop user zhaoyb ; 

drop user 用户名 ; 

删除用户连同此用户创建的表(cascade)
drop user 用户名 cascade; 

 5：查看用户

select * from dba_users;

select * from all_users;

select * from user_users;

6：查看用户系统权限

select * from dba_sys_privs;

select * from all_sys_privs;

select * from user_sys_privs;

7：查看用户对象权限

select * from dba_tab_privs;

select * from all_tab_privs;

select * from user_tab_privs;

8：查看所有角色

select * from dba_roles;

9：查看用户所拥有的角色

select * from dba_role_privs;

select * from user_role_privs;

10：查看当前用户的缺省表空间

select username,default_tablespace from user_users;

11：查看某个角色的具体权限

如grant connect,resource,create session,create view to TEST;

12：查看RESOURCE具有那些权限

SELECT * FROM DBA_SYS_PRIVS WHERE GRANTEE='RESOURCE';

13：修改密码

alter user zhaoyb identified by 1234;

alter user 用户 identified by 密码;

加密后的值用by values修改
alter user zhaoyb identified by values '2D594E86F93B17A1';

alter user 用户 identified by values '2D594E86F93B17A1';

14：查找用户的默认表空间

select   username,  DEFAULT_TABLESPACE   from  dba_users;