例如，查询在输出列表中包括主键时。

An example is if the query includes a primary key in the output list.

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从Mappings窗口，将top映射到输出列表，然后单击auto Map。

From the Mappings window, map top to the output list, and then click Auto map.

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有一种很好的做法：为每个报表或输出列表构造一个原型，并考虑需要哪些项才能生成该报表。

It makes good sense to construct a prototype of each report or output listing and consider what items you will need to produce the report.

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