Known as the topic, the present usage scenario is that all the orders of a certain city in the data, the fields are: date, ID, name, such as sales, want to take time and ID to aggregated data, after the polymerization using sales for the second group of data grouping is the condition of every 10 single interval, should be the last to each interval the number of staff;

Now can sum groupby primary functions such as aggregation of data for the first time, want to ask next secondary data grouping should be how to operate the