Converting Columns to Rows: A Simple Method Using Melt in PySpark and Pandas

How to Aggregate Dates in a Pandas DataFrame Using Groupby Sum

Converting Quarterly Reports in PostgreSQL: A Better Approach with Conditional Aggregation

Converting and Manipulating DataFrames in Pandas: A Step-by-Step Guide to Pivoting and Flattening

5 Ways to Create a New Column Based on Values from Other Columns in Pandas

Manipulating Pandas Pivot Tables: Advanced Techniques for Calculating Percentages

Dynamic Pivoting and Aggregate Functions for Efficient Data Transformation in SQL

Converting Wide Format DataFrames to Long Format with Pandas' wide_to_long Function

How to Use Oracle's PIVOT Operation to Create Custom Pivot Tables

Finding Last Shared Date Among Representatives: Unpivoting and Scaling Up Approaches