Using read_csv to Specify Data Types for Groups of Columns in R: A Practical Approach with Regular Expressions and type.convert

Advanced Data Manipulation with R: Selecting Columns Based on Patterns in a data.table Using Regular Expressions

Selecting Data with Count on Three Tables: A Step-by-Step Guide to Efficient SQL Queries

Understanding and Mastering Dplyr: A Step-by-Step Guide to Filtering, Transforming, and Aggregating Data with R's dplyr Library