不带任何参数时，cal将显示当前月份的日历。

With no arguments, CAL prints the calendar for the current month.

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创建一些计算来分离当前月份和上个月份的值。

Create Calculations to Separate Current and Previous Month values.

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同一个公司可能会在每日获取当前月份的数据，并且每天一次构建这个数据集。

The same company may also capture the current month's data at the day level and build this cube once a day.

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