An example of an aggregation operation is calculating the average daily temperature from a month's worth of daily temperature values.
从一个月的日温度值计算日平均温度就是聚合运算的一个示例。
An example of an aggregation operation is calculating the average daily temperature from a month's worth of daily temperature values.
从一个月的日温度值计算日平均温度就是聚合运算的一个示例。
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