在PLSQL中用户登陆后，使用以上脚本一次性删除所有该用户创建的对象，包括表，视图，序列，触发器，存储过程等等，恢复到数据库刚刚创建的那个状态。-use this scr ipt,you can

delete all the objects including tables, views, triggers ,sequences , procedures and etc.

make your oracle database recovering to the newly created status.