系統許可權與物件許可權
一、系統許可權
1、建立使用者

SQL> create user dog identified by wangwang;
User created

SQL> create user pig identified by hengheng;
User created

SQL> create user fox identified by youyou;
User created

SQL> create user cat identified by miaomiao;
User created

2、給cat賦權
SQL> grant create session, select any table,create table,create view to cat;
Grant succeeded

3、cat給dog賦權
SQL> conn cat/miaomiao;
Connected to Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
Connected as cat

SQL>  grant create session, select any table,create table,create view to dog;
grant create session, select any table,create table,create view to dog
ORA-01031: 許可權不足

  給cat賦權時沒有再賦權的權力，需加:WITH ADMIN OPTION

4、收回許可權 revoke

SQL> revoke create session, select any table,create table,create view from cat;
Revoke succeeded

5、許可權檢視
SQL> select * from dba_sys_privs where grantee='CAT';
GRANTEE                        PRIVILEGE            ADMIN_OPTION
------------------------------ -------------------- ------------


二、物件許可權8個
    execute,alter,select,insert,update,delete,index,references

1、授權emp表給所有使用者
SQL> grant select on emp to public;
Grant succeeded
  檢視
SQL> select * from user_tab_privs_made;
GRANTEE                        TABLE_NAME                     GRANTOR                        PRIVILEGE            GRANTABLE HIERARCHY
------------------------------ ------------------------------ ------------------------------ -------------------- --------- ---------
PUBLIC                         EMP                            SCOTT                          SELECT               NO        NO

2、授權表中某列給使用者

SQL> grant update(sal) on emp to cat;
Grant succeeded

SQL> grant update(job) on emp to cat;
Grant succeeded
 檢視
SQL>  select * from user_col_privs_made;
GRANTEE                        TABLE_NAME                     COLUMN_NAME                    GRANTOR                        PRIVILEGE            GRANTABLE
------------------------------ ------------------------------ ------------------------------ ------------------------------ -------------------- ---------
CAT                            EMP                            SAL                            SCOTT                          UPDATE               NO
CAT                            EMP                            JOB                            SCOTT                          UPDATE               NO