通过下面语句可以得到要删除Oracle的所有表、索引、序列... 的语句

select 'drop table ' || table_name ||';'||chr(13)||chr(10) from user_tables;  --delete tables

select 'drop view ' || view_name||';'||chr(13)||chr(10) from user_views;  --delete views

select 'drop sequence ' || sequence_name||';'||chr(13)||chr(10) from user_sequences;--delete seqs

select 'drop function ' || object_name||';'||chr(13)||chr(10) from user_objects  where object_type='FUNCTION';--delete functions

select 'drop procedure ' || object_name||';'||chr(13)||chr(10) from user_objects  where object_type='PROCEDURE';--DELETE PROCEDURE

select 'drop package ' || object_name||';'||chr(13)||chr(10) from user_objects  where object_type='PACKAGE';--delete pags

如果要是用PL/SQL工具查询的 直接把查询结果拷贝出来执行就行了。