How to Aggregate Dates in a Pandas DataFrame Using Groupby Sum

Removing Duplicate Rows and Transforming Date Columns in SQL

Counting Rows that Share a Unique Field in Pandas Using Pivoting and Transposing Techniques

Transposing a Table in SQL Server 2016: A Step-by-Step Guide to Using PIVOT

Merging Rows with a Pairwise Relationship in SQL: Self-Join vs Conditional Aggregation Solutions

Counting Total Day Difference in Pivot SQL: A Step-by-Step Guide

Pivot Data in Case of Multiple Values When Using Pandas' GroupBy Functionality

Optimizing Complex Column Transposition with Pivot Function in Pandas

Converting Pandas DataFrames from Long to Wide Format Using Multi-Index Composite Keys

Transforming Pivoted Data in SQL Server: A Step-by-Step Guide