https://blog.exploratory.io/introducing-pivot-table-1c9c949fd2d6
Introducing Pivot Table
https://jakevdp.github.io/PythonDataScienceHandbook/03.09-pivot-tables.html
Pivot Tables
https://en.wikipedia.org/wiki/Pivot_table Pivot table
https://medium.com/data-science-concise/excel-pivot-tables-in-5-minutes-a3023d114d01
Excel — Pivot Tables in 5 Minutes
https://www.youtube.com/watch?v=qv-KtAzFG_A Python Pandas Tutorial 13 | How to Create Pivot Table in Python Pandas | Pivot Tables in Python
https://www.youtube.com/watch?v=6gynkH8NZnA Data Modeling in Excel using Power Pivot
https://www.youtube.com/watch?v=vseglUIWScQ
How to pivot into Data Science - Episode 4 | GreyAtom
https://mode.com/resources/sql-tutorial/sql-pivot-table/ Pivoting Data in SQL