Oracle教程 误添加数据文件删除方法
今天又有朋友问到，当向一个表空间错误的添加了一个数据文件，如何来将这个文件删除?
如果是在Oracle10g之前，删除一个表空间中的数据文件后，其文件在数据库数据字典中会仍然存在，除非你删除表空间，否则文件信息不会清除。但是从Oracle10gR2开始，Oracle允许我们彻底删除一个空文件，不留痕迹。
但是注意：如果你向SYSTEM表空间错误的添加了一个文件，那么就让它在哪里好了，不要动。
对于普通表空间，则可以参考以下步骤处理。
数据库版本Oracle10gR2：
向USERS表空间增加一个数据文件：
确认表空间文件信息：
确认表空间未被存储占用：
删除表空间中的空数据文件：
检查数据字典，这个空文件的信息已经被彻底清除了：
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