如何删除用户及表空间和对应的DBF文件

select * from dba_data_files;

select * from dba_users;

drop user LZ_CTI_TEST cascade;

drop tablespace LZ_CTI_TEST_TEST_TEMP including contents and datafiles cascade constraint;
无法停止的话，手动关闭

select username,sid,serial# from v$session

alter system kill session '203,39253'
然后停服务手动删除DBF文件