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

Decomposing Time Series Data in R using stats Package and data.table Alternative Methods

Calculating Sums in SQL: Best Practices for Efficient and Accurate Results

Mastering Time Aggregation in Microsoft SQL Server 2019: A 15-Second Solution

Mastering Row-Wise Operations in SQL: Techniques for Calculating Aggregations and Ratios Across Adjacent Rows.

Aggregating Beta and Co-Skewness per Year Using User-Defined Functions and Regression Analysis in R

How to Use Groupby with Conditions in Data Analysis

Using Case When Statements and Windows Size for Data Grouping in R

Aggregating Count Data with R's data.table Package