FIXED format cannot be used because this format mandates the presence of EXTERNAL column specification, which is not possible with this type (EXTERNAL column specification is discussed below).

不能使用fixed格式，因为这种格式强制要求external列指定(external列指定将在下面讨论)，而这对这种格式是不可能的。

youdao

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。

youdao

Creation of external tables also includes a USING clause in addition to the column specification.

除列指定之外，外部表的创建还包含一个using子句。

youdao

And I moved hundreds of hours from our column on the project spreadsheet to their column, thereby reducing the external cost of the project.

FORBES: Your Project Failed? Don't Blame Microsoft. Blame Me.