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Learning links
10 September 2025
Databases & SQL
W3Schools SQL

Beginner-friendly SQL tutorials with examples of queries, joins, constraints, and subqueries, plus an interactive editor.

Data Analytics
IBM Data Analyst Professional Certificate (Audit Free)

Covers data analysis with Excel, SQL, Python, and data visualization tools, including projects and case studies; free in audit mode.

Data Analytics
Kaggle Learn - Data Analysis

Hands-on mini-courses for Python, R, SQL, and visualization with Jupyter notebooks that run directly in the browser.

Books
Build a Large Language Model from Scratch

Charanpal Dhanjal

A hands-on guide to constructing your own LLM using modern machine learning techniques

Data Analytics
edX - Data Analysis for Life Sciences

Harvard's free online courses teaching statistics, inference, modeling, and machine learning in the context of data science.

Math
Saylor Academy - Mathematics

Free, full-length math courses (Linear Algebra, Abstract Algebra, Real Analysis, etc.) with exams and certificates.

Databases & SQL
SQLZoo

Hands-on SQL practice with guided problems, quizzes, and interactive database queries to reinforce concepts.

Data Analytics
UC Berkeley Data 8 (Foundations of Data Science)

Introductory data science/analytics course using Python; includes lectures, labs, and exercises for free online.

PowerBI
Power BI Guided Learning (Microsoft)

Step-by-step tutorials directly from Microsoft, teaching data connection, modeling, visualization, and publishing dashboards.

GRE Prep
Kaplan GRE Free Resources

Free practice tests, sample questions, and study materials from Kaplan.

Data Analytics
Dataquest Free Data Analysis Courses

Browser-based lessons in Python, SQL, and data visualization; first modules free.

Databases & SQL
SQLBolt

Step-by-step interactive tutorials and exercises for learning SQL basics and querying relational databases.

Databases & SQL
SQLite Tutorial

Focused tutorials on SQLite, covering SQL basics, database management, and practical coding examples.

Data Analytics
Harvard Business School Online - Data Science Ready (Free Modules)

Intro modules teaching how analytics applies to business decisions, tailored for managers and analysts.

GRE Prep
Test Guide - GRE Practice

Large collection of free online GRE practice tests and section-specific drills.

Python
Python.org Official Tutorial

The official Python tutorial covering core concepts, syntax, and standard library basics directly from the maintainers.

Python
Programiz Python

Beginner-friendly tutorials covering Python basics, data structures, object-oriented programming, and standard libraries.

Databases & SQL
Khan Academy - Intro to SQL

Beginner-friendly course teaching SQL fundamentals with practice problems and video explanations.

Data Analytics
The Carpentries - Data Carpentry

Community-driven lessons for researchers covering data organization, cleaning, visualization, and analysis in R, Python, and SQL.

Books
The Coming Wave

Mustafa Suleyman

A visionary look at how emerging technologies will reshape the 21st century