Free Data Science Resources

Free Study Materials for Data Science & AI

Every resource below is created by Vaibhav Gupta (IIT Kanpur & Delhi certified) and used by 300+ DSWallah students. These are not generic PDFs ? they're battle-tested materials that help students get placed in Lucknow and across India.

SQL Notes PDF

SELECT, JOINs, aggregations, window functions, CTEs, 50+ practice queries with answers. Covers MySQL and PostgreSQL. Used by our Data Analyst and Data Science students.

Python Cheatsheet

Pandas, NumPy, Matplotlib quick reference for Data Science interviews. Includes 20+ code snippets for data cleaning, transformation, and visualization.

Excel Cheat Sheet

Pivot tables, VLOOKUP, Power Query, conditional formatting, data validation. Essential for Business Analyst and Data Analyst roles in Lucknow.

Resume Template

ATS-friendly Data Analyst resume template used by DSWallah students. Includes project section format, skills layout, and achievement bullet examples.

? Interview Questions Pack

50+ SQL interview questions, 30+ Python coding challenges, Power BI scenario questions, and Gen AI prompt engineering questions with detailed answers.

Power BI DAX Reference

50 most-used DAX formulas with examples. CALCULATE, TIME INTELLIGENCE, FILTER functions. Perfect for BI interviews.

Gen AI Prompt Engineering Guide

100+ prompts for ChatGPT, Gemini, Claude. Chain-of-thought, few-shot, system prompts. Applicable to data analysis and automation.

Statistics Cheat Sheet

Hypothesis testing, probability distributions, confidence intervals, p-values, A/B testing formulas. Essential for data science interviews.

How to Get These Resources

Message us on WhatsApp with "FREE RESOURCES" and we'll send download links within minutes. No form filling, no email required ? just WhatsApp.

These resources are completely free. We create them because we believe in helping students learn ? not just sell courses. If you find them useful, share them with your friends.

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Why These Resources Are Different

Most free resources online are outdated, generic, or require email signups. Ours are:

Created by an IIT-certified mentor ? Vaibhav Gupta (IIT Kanpur & Delhi)
Used by 300+ students who got placed in Lucknow and across India
Updated regularly ? aligned with 2026 job market requirements
Practical, not theoretical ? real code, real queries, real scenarios
100% free ? no email, no form, no catch

Want structured learning? Explore our courses in Lucknow ? Python ? Data Science ? Best data science institute in Lucknow ? AI course in Lucknow