以管理员身份登录数据库
创建用户：create user [username] identified by [password];
赋予登录权限：grant create session to [username];
赋予建表权限：grant create table to [username];
赋予表空间使用权限：grant unlimited tablespace to [username];
用户拥有建表权限，相应拥有增删查改权限
查看用户权限：select * from user_sys_privs;
撤销登录权限：revoke create session to [username];
撤销建表权限：revoke create table from [username];
撤销表空间使用权限：revoke unlimited tablespace from [username];
赋予所有用户建表权限：grant create session to public;
赋予用户当前表查询权限：grant select on [tablename] to [username];
赋予用户当前表所有权限：grant all on [tablename] to [username];
撤销用户当前表查询权限：revoke select on [tablename] from [username];
撤销用户当前表所有权限：revoke all on [tablename] from [username];
赋予用户当前表当前列更新权限：grant update ([column]) on [tablename] to [username];
赋予用户当前表当前列插入权限：grant insert ([column]) on [tablename] to [username];
系统权限传递：
grant alter table to [username] with admin option;
对象权限传递：
grant select on [tablename] to [username] with grant option;
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grant create session,create table,create view,create any index to [username];
grant unlimited tablespace to [username];
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