例如，在汇总查询中不能显示个别行的内容。

For example, you cannot display the contents of individual rows in a summary query.

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汇总查询的最重要原则就是它只能产生摘要资讯。

The overriding principle is that aggregate queries can result only in summary information.

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您可以使用自订运算式取代汇总查询中任何位置的汇总函式。

You can use custom expressions in place of aggregate functions anywhere in an aggregate query.

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