Adding Fake Data to a Data Frame Based on Variable Conditions Using R's dplyr Library

Merging DataFrames Based on Cell Value Within Another DataFrame

Finding Occurrence of Substring in Sentence Only if Word Starts with Substring

Converting SQL Server STUFF + FOR XML to Snowflake: A Guide to Listing Values

Implementing Ensemble Methods in R: A Deep Dive into C4.5 with Bagging CART, Boosted C5.0, and Random Forest

Mastering MySQL Date Calculations: Converting Years and Weeks into Dates Accurately

Understanding the Issue with Computing SVD on a Covariance Matrix in Microsoft R and Vanilla R: A Study of Numerical Instability

How to Hint About Pandas DataFrames' Schemas Statically for Better Code Completion, Type Checking, and Predictability

Here's a Python solution using SQL-like constructs to calculate the required metrics:

Understanding Joins and Handling Duplicate Rows in SQL Queries: Strategies for Minimizing Duplicates