Understanding SQL Joins and Aggregate Functions

Using Aggregate Function in R: Summarizing Data by Group

Selecting Rows with Maximal Values in a Column Using Pandas GroupBy Operations

Finding Sailors Who Have Booked Every Boat: A Query-Based Approach

Understanding Group By Statements in SAS and SQL for Data Manipulation and Analysis Techniques

Transforming Data from Long Format to Wide Format Using dcast() in data.table

Creating a Horizontal Bar Plot with Pandas and Seaborn: A Step-by-Step Guide

Creating a New Dummy Variable Based on Existing Dummy Variable Values in R using dplyr Package

Grouping Files by Name Using Regex in R: A Step-by-Step Guide