oracle 对象权限

drop user test cascade;
create user test identified by test;
grant create session to test;
grant create any table to test;
conn test/test;
create table scott.test (id number);
conn scott/tiger;
insert into test values(888);
select * from test;
conn test/test;
select * from scott.test;
conn scott/tiger;
grant select on test to test;
conn test/test;
select * from scott.test;
conn scott/tiger;
alter table test add(name varchar(10));
select * from test;
// 授予更新权限时可以更加细致地加到某一列上
grant update(name) on test to test;
conn test/test;
update scott.test set name = ‘李四‘;
update scott.test set id = ‘999‘;

conn sys as sysdba;

create user test1 identified by test1;create user test2 identified by test2;grant create session to test1,test2;// 后面的选项表示可以级联授权grant select on scott.emp to test1 with grant option;conn test1/test1;grant select on scott.emp to test2;conn test2/test2;select * from scott.emp;conn sys as sysdba;revoke select on scott.emp from test1;conn test2/test2;select * from scott.emp; //查不到了