创建用户：

CREATE USER itpux IDENTIFIED BY itpux DEFAULT TABLESPACE datadbs TEMPORARY TABLESPACE tmpdbs;

删除用户：

DROP USER itpux;

删除用户及包含的对象：

DROP USER itpux CASCADE;

获取用户信息的数据字典：

DBA_USERS

DBA_TS_QUOTAS

GRANT CREATE SESSION TO itpux;

GRANT CREATE SESSION TO itpux WITH ADMIN  OPTION;

REVOKE CREATE TABLE FROM itpux;

GRANT EXECUTE dbms_output TO itpux;

GRANT UPDATE ON itpux2.tab1 TO itpux WITH GRANT OPTION;

REVOKE SELECT ON itpux2.tab1 FROM itpux;

查询权限的数据字典：

DBA_SYS_PRIVS

SESSION_PRIVS

DBA_TAB_PRIVS

DBA_COL_PRIVS

create user itpux2 identified by itpux2 default tablespace itpux_dbs temporary tablespace tmp_dbs;

grant dba to itpux2;

drop user itpux1 cascade;

drop tablespace itpux1_dbs including contents and datafiles;