Subscribe to Receive the Resources that I Use and Recommend – It’s Free

SQL

Books

SQL in 10 Minutes, Sams Teach Yourself (4th Edition) Beginner
SQL Queries for Mere Mortals: A Hands-On Guide to Data Manipulation in SQL (3rd Edition) Advanced

Python

Books

Automate the Boring Stuff with Python: Practical Programming for Total Beginners Beginner
Python Crash Course: A Hands-On, Project-Based Introduction to Programming Beginner

R

Books

R Cookbook: Proven Recipes for Data Analysis, Statistics, and Graphics (O’reilly Cookbooks) Beginner
R for Data Science: Import, Tidy, Transform, Visualize, and Model Data Beginner

Machine Learning

Books

An Introduction to Statistical Learning: with Applications in R (Springer Texts in Statistics) Beginner
The Elements of Statistical Learning: Data Mining, Inference, and Prediction, Second Edition (Springer Series in Statistics) Advanced