Counting and Aggregating with data.table: Efficient Data Manipulation in R

Automating Column Name Creation after Aggregation in R with Aggregate Function

Efficiently Concatenating Character Content Within One Column by Group in R: A Comparative Analysis of tapply, Aggregate, and dplyr Packages

How to Remove Duplicates from Multiple Joined Arrays in Postgres Using Knex

Resolving Aggregate Issues on POSIXct Objects: A Step-by-Step Guide to Accurate Date Time Calculations

Decomposing Time Series Data in R using stats Package and data.table Alternative Methods

Aggregating Data from One DataFrame and Joining it to Another with Pandas in Python

Grouping Pandas Dataframe by Elements in Column of Lists: An Efficient Solution

Maximizing Efficiency in Complex Queries: A Solution Using Common Table Expressions (CTEs)