Filtering Data with String Matching Functions in R

Sum a Column Based on Condition in R Using Filter and Summarise Functions

Handling Missing Dates in R: A Deep Dive into Date Range Calculation after Every Seventh Day While Ignoring the Missing Dates

Understanding SQL Aggregation and Alias Reuse Limitations: Workarounds and Best Practices for Complex Calculations

Understanding Matrix Operations in R: A Common Gotcha and How to Avoid It