7. GroupBy and Aggregations
Chala mitrano, aaj aapan groupby — Excel Pivot sarkha concept, pan code madhe. City × status summaries, named aggregations, festival spikes. Important aahe!
What you will learn in this chapter
- groupby one and many keys
- agg with sum, mean, count, nunique
- Named aggregations for clean column names
- City × festival-style summaries
Fictional data
Blinkit / Amazon Now figures in this chapter are fictional sample data for learning only. They do not show real company numbers. People names are for practice; e-mails use example.com.
Concepts in this chapter
The chapter recap is at the end of the last concept page.