Categories / group-by
Counting Distinct IDs for Each Day within the Last 7 Days using SQL
Calculating Average Session Duration per User with SQL
Group Shift Operations in Pandas DataFrames: A Comprehensive Guide
Grouping Sequential Data in R with dplyr Package for Consecutive Values
Solving the "All In" Group By Problem with SQL Aggregation and COALESCE
Why GROUP BY is Required When Including Columns from Another Table in Your Results
Counting Similar Events in the Previous 7 Days with Pandas
Optimizing SQL Queries for Conditional Summation