oracle 删除当前用户下所有的表、索引、序列...

 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

先删子表后删父表，如果两张表相互有主外键约束，drop table tablename cascade constraints即可