Solving Date Manipulation Challenges: Counting Sessions by 15-Minute Intervals in Business Days

How to Use dplyr's mutate Function to Perform Conditional Sums in R

Counting Values in Column with Ranges Given a Specific Condition

Plotting Frequency Data: A Comparative Analysis of `table()`, `cut()`, and `hist()` in R

Summarizing Multiple Columns with dplyr: A Categorical Version

Understanding SQL Aggregations with GROUP BY: Count and Beyond