每个条目的关键日期和信。

Key each entry by date and letter.

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如果仅有 To 值存在 -> To 日期就用作关键日期。

Values exist only for “To” -> “To” date is used as key date.

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在针对这些层次结构编写报告时，且在执行报告以前，IBM Cognos将基于这些存储期设置关键日期。

When authoring a report against such hierarchies, prior to executing a report, IBM Cognos will set the key date based on these stored periods.

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