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Grouping Aggregations
In this lesson, we will learn how to use the GroupBy method to group data and perform aggregations on the groups. GroupBy is a method that groups data based on the values of one or more columns. Once the data is grouped, we can perform aggregations on the groups. It is incredibly useful when we want to calculate statistics for different groups in our data. You need at least two pieces of information to use the GroupBy method:
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