In the IFS, the files exist as a sequence of bytes without any data format specified by the file attributes.

在IFS中，文件的存在形式是一个字节序列，没有任何由文件属性指定的数据格式。

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Informix: if the data format is specified as Informix, the data read (or written) from (or to) the file is in the binary format that can be decoded only by Informix.

Informix：如果数据格式指定为Informix，从(到)文件的数据读(或写)将采用只能通过Informix解码的二进制格式。

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DBDATE: the date column values in the external data file are in the format specified by this DBDATE.

DBDATE：外部数据文件中的日期列值采用由这个DBDATE指定的格式。

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