Mastering Pivot Tables: Grouping by Various Columns and Rows Using Pandas

Summing Over Particular Columns of a Data Frame in R: A Comparative Analysis of aggregate(), dplyr, and Beyond

Transforming Table Structure: SQL Query for Aggregating Data

Mastering Pivoting and Cross Tabulation in SQL: Dynamic Techniques for Data Transformation

Separating Multiple Variables in the Same Column Using Pandas

Finding Length Matches and Aggregating Values with dplyr in R

Understanding the Behavior of `bind_rows` and `summarize_if` in Creating Pivot Tables with R Studio Tidyverse Libraries

How to Transform Data from Long Format to Wide Format Using Postgresql's MAX(CASE) Function