Group By and Summarize Data with Specific Column Values in R: A Comprehensive Guide to Handling Unique Values and Alternatives

Using max() Window Function with Case When for Conditional Grouping and Aggregation in SQL

Counting Non-Numeric Grades Using Dplyr vs Base R

Solving SQL 'GROUP BY' Multiple Rows Ignoring One Using Common Table Expressions

Ranking Column Values with Pandas: A Step-by-Step Guide to Dense Ordering Using the `rank()` Function

Performing Group-By Operations on Another Column in R Using Dplyr Package

Counting Distinct IDs for Each Day within the Last 7 Days using SQL

Calculating Average Session Duration per User with SQL

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

Unpivoting a Query in Presto to Get Column Names Based on Condition