Creating a New Column Based on Mode: A Flexible Approach in R

Updating Columns Based on Several Conditions - Group by Method

Understanding SQL Server's Grouping and Filtering: A Solution to Identifying Repeating Values

Calculating School Status Based on Has-Many Constraint in Ruby on Rails with Postgres

Filtering SQL Result by Condition to Receive Only One Row per Customer for Each Product Type.

Conditional Aggregation Techniques for Data Analysis: Grouping by Date and Calculating Various Metrics

Finding the row(s) which have the max value in groups using groupby

How to Get Data Within a Specific Date Range Broken Down by Each Day with a Single SQL Query

Solving Arithmetic Progressions to Find Missing Numbers

Ranking and Grouping DataFrames Using Pandas: Advanced Techniques for Data Analysis