Tags / unpivot
Dynamic Unpivoting: A Guide to Transforming Tables with Columns of Different Types
Unpivoting Oracle Tables: A Step-by-Step Guide to Multiple Columns
Using the stack() Method to Simplify Matrix DataFrame Manipulation
Converting Columns to Rows Using SQL Server's CROSS APPLY and VALUES Function
Constructing a New Table by Aggregating Values in One Table: A Comprehensive Guide to Calculating Purchase Rates