Calculating the Average of Multiple Entries with Identical Names Using R.

Data Manipulation with R: A Guide to Concatenating and Averaging Values in a Data Frame

Calculating Average Cost Over Date Range with Latest Cost in Single SQL Query

Calculating Average Value in a LEFT JOIN Between Two Tables

Calculating and Handling Outlier in Mean Values of Two R DataFrames with Dplyr Library

Handling Moving Averages and NULL Values in TSQL: Best Practices for Resilient Data Analysis

Advanced Grouping in R using the `ave()` Function