If a database is not shut down cleanly, for example, an instance fails or you issue a SHUTDOWN ABORT statement, the database's datafiles are always inconsistent--unless you opened the database in read-only mode. Instance recovery will be required at open time.
Linux下退出前最好shutdown一下
不过win和unix应该都可以设置关机的时候自动关闭数据库的
关机不关数据库相当于没有TT就ML,运气好就没事,运气不好就挂了
再请教有经验的oracle管理员