数据对象和权限

1、grant create session to   t2;

2、conn t3/t2;

3、conn t1/t1;

4、conn t2/t2;

5、grant create table to t3;

6、revoke from 

7、grant  to

角色  role

系统

对象

8、DML:删改查增  数据操作

     DDL:数据定义

9、grant create table to t2 with admin option;

10、grant create table to t3;

11、

dba   --->   t1

admin option

t1 ---> t2

没有admin

dba ---> t1 ---> t2 ---> t3

　　adm　　adm

dba

revoke create table from t1;

conn t2/t2;

create table tttt(id number(10));

系统权限给出去就收不回了；

select table_name from user_tables;

drop table tt;

drop table t;

conn / as sysdba;

alter user t3 identified by t3;

conn / as sysdba;

show user;

desc test;

insert into test values (sysdate(), ‘AAAA’)；

select * from test;

select * from sys.test;

grant select on test to  t1;

select * from sys.test;

grant select on test to t2;

revoke select on test from t1;

grant select on test to t1 with grant option;

grant select on test to t2;

grant select on sys.test to t2;

select * from sys.test;

grant select on test to t2;

grant select on sys.test to t2;

revoke select on test from t1;

grant select on test to t1 with grant option;

--------------------------------------------------------

一组权限的组合   Roles

select table_name from dict where table_name like ‘%PRIV%‘;

desc USER_SYS_PRIVS;

select username from USER_SYS_PRIVS;

select unique(username) from USER_SYS_PRIVS;

select count(1) from USER_SYS_PRIVS;

grant connect, resource to t1;

select table_name from dict where table_name like ‘%PROFILE%‘;

select resource_name, limit from dba_profiles;

userprofile;

Schema

方案

结构

模式

纲要

用户对象的集合---Schema

数据对象和权限

原文：https://www.cnblogs.com/niaocaizhou/p/10778137.html